From a58bc3dc217388ed231a5862335a140d8b884469 Mon Sep 17 00:00:00 2001
From: Arthur <contact@creeperkatze.dev>
Date: Sat, 23 May 2026 16:46:12 +0200
Subject: [PATCH] feat: java installation ui improvements (#5731)

* Clean impl of java installation ui improvements

* Migrate composable to ts

* Migrate to ButtonStyled, fix coloring

* Fix lint

* Fix clearing java path not refreshing state

* fix: use Table component + install btn disabled state tooltip

---------

Signed-off-by: Arthur <creeperkatze.dev@gmail.com>
Signed-off-by: Arthur <contact@creeperkatze.dev>
Co-authored-by: Creeperkatze <178587183+Creeperkatze@users.noreply.github.com>
Co-authored-by: Calum H. <calum@modrinth.com>
Co-authored-by: Calum H. (IMB11) <contact@cal.engineer>
---
 .../src/components/ui/JavaDetectionModal.vue  |  77 +++---
 .../src/components/ui/JavaSelector.vue        | 176 ++++++++------
 .../ui/instance_settings/JavaSettings.vue     | 229 ++++++++++++++----
 .../src/composables/useJavaTest.ts            |  52 ++++
 apps/app-frontend/src/helpers/profile.ts      |   9 +-
 .../app-frontend/src/locales/en-US/index.json |  21 ++
 6 files changed, 395 insertions(+), 169 deletions(-)
 create mode 100644 apps/app-frontend/src/composables/useJavaTest.ts

diff --git a/apps/app-frontend/src/components/ui/JavaDetectionModal.vue b/apps/app-frontend/src/components/ui/JavaDetectionModal.vue
index 844aff52f..3f864c647 100644
--- a/apps/app-frontend/src/components/ui/JavaDetectionModal.vue
+++ b/apps/app-frontend/src/components/ui/JavaDetectionModal.vue
@@ -1,35 +1,33 @@
 <template>
 	<ModalWrapper ref="detectJavaModal" header="Select java version" :show-ad-on-close="false">
-		<div class="auto-detect-modal">
-			<div class="table">
-				<div class="table-row table-head">
-					<div class="table-cell table-text">Version</div>
-					<div class="table-cell table-text">Path</div>
-					<div class="table-cell table-text">Actions</div>
-				</div>
-				<div v-for="javaInstall in chosenInstallOptions" :key="javaInstall.path" class="table-row">
-					<div class="table-cell table-text">
-						<span>{{ javaInstall.version }}</span>
-					</div>
-					<div v-tooltip="javaInstall.path" class="table-cell table-text">
-						<span>{{ javaInstall.path }}</span>
-					</div>
-					<div class="table-cell table-text manage">
-						<ButtonStyled v-if="currentSelected.path === javaInstall.path">
-							<button disabled><CheckIcon /> Selected</button>
+		<div class="flex flex-col gap-4">
+			<Table :columns="javaInstallColumns" :data="chosenInstallOptions" row-key="path">
+				<template #cell-version="{ value }">
+					<span class="font-semibold text-primary">{{ value }}</span>
+				</template>
+				<template #cell-path="{ value }">
+					<span v-tooltip="value" class="block truncate font-mono text-xs">{{ value }}</span>
+				</template>
+				<template #cell-actions="{ row }">
+					<div class="flex items-center justify-end">
+						<ButtonStyled v-if="currentSelected.path === row.path">
+							<button class="!shadow-none" disabled><CheckIcon /> Selected</button>
 						</ButtonStyled>
 						<ButtonStyled v-else>
-							<button @click="setJavaInstall(javaInstall)"><PlusIcon /> Select</button>
+							<button class="!shadow-none" @click="setJavaInstall(row)"><PlusIcon /> Select</button>
 						</ButtonStyled>
 					</div>
-				</div>
-				<div v-if="chosenInstallOptions.length === 0" class="table-row entire-row">
-					<div class="table-cell table-text">No java installations found!</div>
-				</div>
-			</div>
-			<div class="input-group push-right">
+				</template>
+				<template #empty-state>
+					<div class="p-4 text-secondary">No java installations found!</div>
+				</template>
+			</Table>
+			<div class="flex justify-end">
 				<ButtonStyled type="outlined">
-					<button @click="$refs.detectJavaModal.hide()">
+					<button
+						class="!shadow-none !border-surface-4 !border"
+						@click="$refs.detectJavaModal.hide()"
+					>
 						<XIcon />
 						Cancel
 					</button>
@@ -40,7 +38,7 @@
 </template>
 <script setup>
 import { CheckIcon, PlusIcon, XIcon } from '@modrinth/assets'
-import { ButtonStyled, injectNotificationManager } from '@modrinth/ui'
+import { ButtonStyled, injectNotificationManager, Table } from '@modrinth/ui'
 import { ref } from 'vue'
 
 import ModalWrapper from '@/components/ui/modal/ModalWrapper.vue'
@@ -52,6 +50,11 @@ const { handleError } = injectNotificationManager()
 const chosenInstallOptions = ref([])
 const detectJavaModal = ref(null)
 const currentSelected = ref({})
+const javaInstallColumns = [
+	{ key: 'version', label: 'Version', width: '9rem' },
+	{ key: 'path', label: 'Path' },
+	{ key: 'actions', label: 'Actions', align: 'right', width: '10rem' },
+]
 
 defineExpose({
 	show: async (version, currentSelectedJava) => {
@@ -77,25 +80,3 @@ function setJavaInstall(javaInstall) {
 	})
 }
 </script>
-<style lang="scss" scoped>
-.auto-detect-modal {
-	.table {
-		.table-row {
-			grid-template-columns: 1fr 4fr min-content;
-		}
-
-		span {
-			display: inherit;
-			align-items: center;
-			justify-content: center;
-		}
-
-		padding: 0.5rem;
-	}
-}
-
-.manage {
-	display: flex;
-	gap: 0.5rem;
-}
-</style>
diff --git a/apps/app-frontend/src/components/ui/JavaSelector.vue b/apps/app-frontend/src/components/ui/JavaSelector.vue
index 505616626..193095d8c 100644
--- a/apps/app-frontend/src/components/ui/JavaSelector.vue
+++ b/apps/app-frontend/src/components/ui/JavaSelector.vue
@@ -1,85 +1,104 @@
 <template>
 	<JavaDetectionModal ref="detectJavaModal" @submit="(val) => emit('update:modelValue', val)" />
-	<div class="toggle-setting" :class="{ compact }">
-		<StyledInput
-			autocomplete="off"
-			:disabled="props.disabled"
-			:model-value="props.modelValue ? props.modelValue.path : ''"
-			:placeholder="placeholder ?? '/path/to/java'"
-			wrapper-class="installation-input"
-			@update:model-value="
-				(val) => {
-					emit('update:modelValue', {
-						...props.modelValue,
-						path: val,
-					})
-				}
-			"
-		/>
+	<div :id="props.id" class="toggle-setting" :class="{ compact }">
+		<div class="input-with-status">
+			<StyledInput
+				autocomplete="off"
+				:disabled="props.disabled"
+				:model-value="props.modelValue ? props.modelValue.path : ''"
+				:placeholder="placeholder ?? '/path/to/java'"
+				wrapper-class="installation-input"
+				@update:model-value="
+					(val) => {
+						emit('update:modelValue', {
+							...props.modelValue,
+							path: val,
+						})
+					}
+				"
+			/>
+			<ButtonStyled
+				:color="
+					!hoveringTest && !testingJava
+						? testingJavaSuccess === true
+							? 'green'
+							: 'red'
+						: 'standard'
+				"
+				color-fill="text"
+			>
+				<button
+					class="!shadow-none"
+					:disabled="testingJava || props.disabled"
+					@click="runTest(props.modelValue?.path)"
+					@mouseenter="!props.disabled && (hoveringTest = true)"
+					@mouseleave="hoveringTest = false"
+				>
+					<SpinnerIcon v-if="testingJava" class="animate-spin h-4 w-4" />
+					<CheckCircleIcon
+						v-else-if="testingJavaSuccess === true && !hoveringTest"
+						class="h-4 w-4"
+					/>
+					<XCircleIcon v-else-if="testingJavaSuccess !== true && !hoveringTest" class="h-4 w-4" />
+					<RefreshCwIcon v-else-if="!props.disabled" class="h-4 w-4" />
+				</button>
+			</ButtonStyled>
+		</div>
 		<span class="installation-buttons">
 			<ButtonStyled v-if="props.version">
-				<button :disabled="props.disabled || installingJava" @click="reinstallJava">
+				<button
+					v-tooltip="testingJavaSuccess === true ? 'Already installed' : undefined"
+					class="!shadow-none"
+					:disabled="props.disabled || installingJava || testingJavaSuccess === true"
+					@click="reinstallJava"
+				>
 					<DownloadIcon />
 					{{ installingJava ? 'Installing...' : 'Install recommended' }}
 				</button>
 			</ButtonStyled>
 			<ButtonStyled>
-				<button :disabled="props.disabled" @click="autoDetect">
+				<button class="!shadow-none" :disabled="props.disabled" @click="autoDetect">
 					<SearchIcon />
 					Detect
 				</button>
 			</ButtonStyled>
 			<ButtonStyled>
-				<button :disabled="props.disabled" @click="handleJavaFileInput()">
+				<button class="!shadow-none" :disabled="props.disabled" @click="handleJavaFileInput()">
 					<FolderSearchIcon />
 					Browse
 				</button>
 			</ButtonStyled>
-			<ButtonStyled v-if="testingJava">
-				<button disabled>Testing...</button>
-			</ButtonStyled>
-			<ButtonStyled v-else-if="testingJavaSuccess === true">
-				<button disabled>
-					<CheckIcon />
-					Success
-				</button>
-			</ButtonStyled>
-			<ButtonStyled v-else-if="testingJavaSuccess === false">
-				<button disabled>
-					<XIcon />
-					Failed
-				</button>
-			</ButtonStyled>
-			<ButtonStyled v-else>
-				<button :disabled="props.disabled" @click="testJava">
-					<PlayIcon />
-					Test
-				</button>
-			</ButtonStyled>
 		</span>
 	</div>
 </template>
 
 <script setup>
 import {
-	CheckIcon,
+	CheckCircleIcon,
 	DownloadIcon,
 	FolderSearchIcon,
-	PlayIcon,
+	RefreshCwIcon,
 	SearchIcon,
-	XIcon,
+	SpinnerIcon,
+	XCircleIcon,
 } from '@modrinth/assets'
 import { ButtonStyled, injectNotificationManager, StyledInput } from '@modrinth/ui'
 import { open } from '@tauri-apps/plugin-dialog'
-import { ref } from 'vue'
+import { ref, watch } from 'vue'
 
 import JavaDetectionModal from '@/components/ui/JavaDetectionModal.vue'
+import useJavaTest from '@/composables/useJavaTest'
 import { trackEvent } from '@/helpers/analytics'
-import { auto_install_java, find_filtered_jres, get_jre, test_jre } from '@/helpers/jre.js'
+import { auto_install_java, find_filtered_jres, get_jre } from '@/helpers/jre.js'
 
 const { handleError } = injectNotificationManager()
 
 const props = defineProps({
+	id: {
+		type: String,
+		required: false,
+		default: null,
+	},
 	version: {
 		type: Number,
 		required: false,
@@ -110,29 +129,36 @@ const props = defineProps({
 
 const emit = defineEmits(['update:modelValue'])
 
-const testingJava = ref(false)
-const testingJavaSuccess = ref(null)
+const {
+	testingJava,
+	javaTestResult: testingJavaSuccess,
+	testJavaInstallationDebounced,
+	testJavaInstallation,
+} = useJavaTest()
 
 const installingJava = ref(false)
+const hoveringTest = ref(false)
+let hasInitialized = false
 
-async function testJava() {
-	testingJava.value = true
-	testingJavaSuccess.value = await test_jre(
-		props.modelValue ? props.modelValue.path : '',
-		props.version,
-	)
-	testingJava.value = false
-
-	trackEvent('JavaTest', {
-		path: props.modelValue ? props.modelValue.path : '',
-		success: testingJavaSuccess.value,
-	})
-
-	setTimeout(() => {
-		testingJavaSuccess.value = null
-	}, 2000)
+async function runTest(path) {
+	await testJavaInstallation(path, props.version, true)
 }
 
+watch(
+	() => props.modelValue?.path,
+	(newPath) => {
+		if (newPath) {
+			if (!hasInitialized) {
+				testJavaInstallation(newPath, props.version, false)
+				hasInitialized = true
+			} else {
+				testJavaInstallationDebounced(newPath, props.version)
+			}
+		}
+	},
+	{ immediate: true },
+)
+
 async function handleJavaFileInput() {
 	const filePath = await open()
 
@@ -142,6 +168,7 @@ async function handleJavaFileInput() {
 			result = {
 				path: filePath.path ?? filePath,
 				version: props.version.toString(),
+				parsed_version: props.version,
 				architecture: 'x86',
 			}
 		}
@@ -175,6 +202,7 @@ async function reinstallJava() {
 		result = {
 			path: path,
 			version: props.version.toString(),
+			parsed_version: props.version,
 			architecture: 'x86',
 		}
 	}
@@ -186,13 +214,23 @@ async function reinstallJava() {
 
 	emit('update:modelValue', result)
 	installingJava.value = false
+	runTest(result.path)
 }
 </script>
 
 <style lang="scss" scoped>
+.input-with-status {
+	display: flex;
+	flex-direction: row;
+	align-items: center;
+	gap: 0.5rem;
+	width: 100%;
+	min-width: 0;
+}
+
 .installation-input {
-	width: 100% !important;
-	flex-grow: 1;
+	flex: 1 1 0;
+	min-width: 0;
 }
 
 .toggle-setting {
@@ -215,12 +253,4 @@ async function reinstallJava() {
 	gap: 0.5rem;
 	margin: 0;
 }
-
-.test-success {
-	color: var(--color-green);
-}
-
-.test-fail {
-	color: var(--color-red);
-}
 </style>
diff --git a/apps/app-frontend/src/components/ui/instance_settings/JavaSettings.vue b/apps/app-frontend/src/components/ui/instance_settings/JavaSettings.vue
index 1b2c45410..46fdf2033 100644
--- a/apps/app-frontend/src/components/ui/instance_settings/JavaSettings.vue
+++ b/apps/app-frontend/src/components/ui/instance_settings/JavaSettings.vue
@@ -1,6 +1,15 @@
 <script setup lang="ts">
-import { CheckCircleIcon, XCircleIcon } from '@modrinth/assets'
 import {
+	CheckCircleIcon,
+	CoffeeIcon,
+	FolderSearchIcon,
+	RefreshCwIcon,
+	SearchIcon,
+	SpinnerIcon,
+	XCircleIcon,
+} from '@modrinth/assets'
+import {
+	ButtonStyled,
 	Checkbox,
 	defineMessages,
 	injectNotificationManager,
@@ -8,9 +17,11 @@ import {
 	StyledInput,
 	useVIntl,
 } from '@modrinth/ui'
+import { open } from '@tauri-apps/plugin-dialog'
 import { computed, readonly, ref, watch } from 'vue'
 
-import JavaSelector from '@/components/ui/JavaSelector.vue'
+import JavaDetectionModal from '@/components/ui/JavaDetectionModal.vue'
+import useJavaTest from '@/composables/useJavaTest'
 import useMemorySlider from '@/composables/useMemorySlider'
 import { edit, get_optimal_jre_key } from '@/helpers/profile'
 import { get } from '@/helpers/settings.ts'
@@ -25,9 +36,54 @@ const { instance } = injectInstanceSettings()
 
 const globalSettings = (await get().catch(handleError)) as unknown as AppSettings
 
-const overrideJavaInstall = ref(!!instance.value.java_path)
 const optimalJava = readonly(await get_optimal_jre_key(instance.value.path).catch(handleError))
-const javaInstall = ref({ path: optimalJava.path ?? instance.value.java_path })
+
+const overrideJavaInstall = ref(!!instance.value.java_path)
+const javaPath = ref(instance.value.java_path ?? optimalJava?.path ?? '')
+
+const activePath = computed(() =>
+	overrideJavaInstall.value ? javaPath.value : (optimalJava?.path ?? ''),
+)
+
+watch(overrideJavaInstall, (enabled) => {
+	if (enabled && !javaPath.value) {
+		javaPath.value = optimalJava?.path ?? ''
+	}
+})
+
+const { testingJava, javaTestResult, testJavaInstallationDebounced, testJavaInstallation } =
+	useJavaTest()
+
+const hoveringTest = ref(false)
+let hasInitialized = false
+
+watch(
+	activePath,
+	(newPath) => {
+		if (newPath && optimalJava?.parsed_version) {
+			if (!hasInitialized) {
+				testJavaInstallation(newPath, optimalJava?.parsed_version, false)
+				hasInitialized = true
+			} else {
+				testJavaInstallationDebounced(newPath, optimalJava?.parsed_version)
+			}
+		}
+	},
+	{ immediate: true },
+)
+
+const javaDetectionModal = ref<{ show: (version: number, current: object) => void } | null>(null)
+
+async function handleBrowseJava() {
+	const result = await open({ multiple: false })
+	if (result) {
+		javaPath.value = result
+	}
+}
+
+function handleDetectJava() {
+	javaDetectionModal.value?.show(optimalJava?.parsed_version, { path: javaPath.value })
+}
 
 const overrideJavaArgs = ref((instance.value.extra_launch_args?.length ?? 0) > 0)
 const javaArgs = ref(
@@ -51,8 +107,8 @@ const { maxMemory, snapPoints } = (await useMemorySlider().catch(handleError)) a
 const editProfileObject = computed(() => {
 	return {
 		java_path:
-			overrideJavaInstall.value && javaInstall.value.path !== ''
-				? javaInstall.value.path.replace('java.exe', 'javaw.exe')
+			overrideJavaInstall.value && javaPath.value
+				? javaPath.value.replace('java.exe', 'javaw.exe')
 				: null,
 		extra_launch_args: overrideJavaArgs.value
 			? javaArgs.value.trim().split(/\s+/).filter(Boolean)
@@ -71,7 +127,7 @@ const editProfileObject = computed(() => {
 watch(
 	[
 		overrideJavaInstall,
-		javaInstall,
+		javaPath,
 		overrideJavaArgs,
 		javaArgs,
 		overrideEnvVars,
@@ -90,17 +146,45 @@ const messages = defineMessages({
 		id: 'instance.settings.tabs.java.java-installation',
 		defaultMessage: 'Java installation',
 	},
+	customJavaInstallation: {
+		id: 'instance.settings.tabs.java.custom-java-installation',
+		defaultMessage: 'Custom Java installation',
+	},
+	javaPathPlaceholder: {
+		id: 'instance.settings.tabs.java.java-path-placeholder',
+		defaultMessage: '/path/to/java',
+	},
+	javaMemory: {
+		id: 'instance.settings.tabs.java.java-memory',
+		defaultMessage: 'Memory allocated',
+	},
+	customMemoryAllocation: {
+		id: 'instance.settings.tabs.java.custom-memory-allocation',
+		defaultMessage: 'Custom memory allocation',
+	},
 	javaArguments: {
 		id: 'instance.settings.tabs.java.java-arguments',
 		defaultMessage: 'Java arguments',
 	},
+	customJavaArguments: {
+		id: 'instance.settings.tabs.java.custom-java-arguments',
+		defaultMessage: 'Custom Java arguments',
+	},
+	enterJavaArguments: {
+		id: 'instance.settings.tabs.java.enter-java-arguments',
+		defaultMessage: 'Enter Java arguments...',
+	},
 	javaEnvironmentVariables: {
 		id: 'instance.settings.tabs.java.environment-variables',
 		defaultMessage: 'Environment variables',
 	},
-	javaMemory: {
-		id: 'instance.settings.tabs.java.java-memory',
-		defaultMessage: 'Memory allocated',
+	customEnvironmentVariables: {
+		id: 'instance.settings.tabs.java.custom-environment-variables',
+		defaultMessage: 'Custom environment variables',
+	},
+	enterEnvironmentVariables: {
+		id: 'instance.settings.tabs.java.enter-environment-variables',
+		defaultMessage: 'Enter environmental variables...',
 	},
 	hooks: {
 		id: 'instance.settings.tabs.java.hooks',
@@ -111,43 +195,86 @@ const messages = defineMessages({
 
 <template>
 	<div>
-		<h2 id="project-name" class="m-0 mb-2.5 text-lg font-semibold text-contrast block">
+		<JavaDetectionModal ref="javaDetectionModal" @submit="(val) => (javaPath = val.path)" />
+		<h2 class="m-0 mb-2 text-lg font-extrabold text-contrast block">
 			{{ formatMessage(messages.javaInstallation) }}
 		</h2>
-		<Checkbox v-model="overrideJavaInstall" label="Custom Java installation" class="mb-2.5" />
-		<template v-if="!overrideJavaInstall">
-			<div class="flex my-2 items-center gap-2 font-semibold">
-				<template v-if="javaInstall">
-					<CheckCircleIcon class="text-brand-green h-4 w-4" />
-					<span>Using default Java {{ optimalJava.major_version }} installation:</span>
-				</template>
-				<template v-else-if="optimalJava">
-					<XCircleIcon class="text-brand-red h-5 w-5" />
-					<span
-						>Could not find a default Java {{ optimalJava.major_version }} installation. Please set
-						one below:</span
+		<Checkbox
+			v-model="overrideJavaInstall"
+			:label="formatMessage(messages.customJavaInstallation)"
+			class="mb-2"
+		/>
+		<div class="flex gap-4 p-4 bg-bg rounded-2xl">
+			<div class="flex gap-3 items-start flex-1 min-w-0">
+				<div
+					class="w-10 h-10 flex items-center justify-center rounded-full bg-button-bg border-solid border-[1px] border-button-border p-2 mt-1 shrink-0 [&_svg]:h-full [&_svg]:w-full"
+				>
+					<CoffeeIcon />
+				</div>
+				<div class="flex flex-col gap-2 flex-1 min-w-0">
+					<span class="font-semibold leading-none mt-2"
+						>Java {{ optimalJava?.parsed_version }}</span
 					>
-				</template>
-				<template v-else>
-					<XCircleIcon class="text-brand-red h-5 w-5" />
-					<span
-						>Could not automatically determine a Java installation to use. Please set one
-						below:</span
-					>
-				</template>
+					<div class="flex gap-2 items-center">
+						<StyledInput
+							:model-value="activePath"
+							:disabled="!overrideJavaInstall"
+							autocomplete="off"
+							:placeholder="formatMessage(messages.javaPathPlaceholder)"
+							wrapper-class="flex-1 min-w-0"
+							@update:model-value="(val) => (javaPath = String(val))"
+						/>
+						<ButtonStyled
+							:color="
+								!hoveringTest && !testingJava
+									? javaTestResult === true
+										? 'green'
+										: 'red'
+									: 'standard'
+							"
+							color-fill="text"
+						>
+							<button
+								:disabled="!overrideJavaInstall || testingJava"
+								@click="testJavaInstallation(activePath, optimalJava?.parsed_version, true)"
+								@mouseenter="overrideJavaInstall && (hoveringTest = true)"
+								@mouseleave="hoveringTest = false"
+							>
+								<SpinnerIcon v-if="testingJava" class="animate-spin h-4 w-4" />
+								<CheckCircleIcon
+									v-else-if="javaTestResult === true && !hoveringTest"
+									class="h-4 w-4"
+								/>
+								<XCircleIcon v-else-if="javaTestResult !== true && !hoveringTest" class="h-4 w-4" />
+								<RefreshCwIcon v-else-if="overrideJavaInstall" class="h-4 w-4" />
+							</button>
+						</ButtonStyled>
+					</div>
+					<div v-if="overrideJavaInstall" class="flex gap-2">
+						<ButtonStyled>
+							<button @click="handleDetectJava">
+								<SearchIcon />
+								Detect
+							</button>
+						</ButtonStyled>
+						<ButtonStyled>
+							<button @click="handleBrowseJava">
+								<FolderSearchIcon />
+								Browse
+							</button>
+						</ButtonStyled>
+					</div>
+				</div>
 			</div>
-			<div
-				v-if="javaInstall && !overrideJavaInstall"
-				class="p-4 bg-bg rounded-xl text-xs text-secondary leading-none font-mono"
-			>
-				{{ javaInstall.path }}
-			</div>
-		</template>
-		<JavaSelector v-if="overrideJavaInstall || !javaInstall" v-model="javaInstall" />
-		<h2 id="project-name" class="mt-6 mb-2.5 text-lg font-semibold text-contrast block">
+		</div>
+		<h2 class="mt-4 mb-1 text-lg font-extrabold text-contrast block">
 			{{ formatMessage(messages.javaMemory) }}
 		</h2>
-		<Checkbox v-model="overrideMemorySettings" label="Custom memory allocation" class="mb-2.5" />
+		<Checkbox
+			v-model="overrideMemorySettings"
+			:label="formatMessage(messages.customMemoryAllocation)"
+			class="mb-2"
+		/>
 		<Slider
 			id="max-memory"
 			v-model="memory.maximum"
@@ -159,28 +286,36 @@ const messages = defineMessages({
 			:snap-range="512"
 			unit="MB"
 		/>
-		<h2 id="project-name" class="mt-6 mb-2.5 text-lg font-semibold text-contrast block">
+		<h2 class="mt-4 mb-1 text-lg font-extrabold text-contrast block">
 			{{ formatMessage(messages.javaArguments) }}
 		</h2>
-		<Checkbox v-model="overrideJavaArgs" label="Custom java arguments" class="my-2" />
+		<Checkbox
+			v-model="overrideJavaArgs"
+			:label="formatMessage(messages.customJavaArguments)"
+			class="my-2"
+		/>
 		<StyledInput
 			id="java-args"
 			v-model="javaArgs"
 			autocomplete="off"
 			:disabled="!overrideJavaArgs"
-			placeholder="Enter java arguments..."
+			:placeholder="formatMessage(messages.enterJavaArguments)"
 			wrapper-class="w-full"
 		/>
-		<h2 id="project-name" class="mt-6 mb-2.5 text-lg font-semibold text-contrast block">
+		<h2 class="mt-4 mb-1 text-lg font-extrabold text-contrast block">
 			{{ formatMessage(messages.javaEnvironmentVariables) }}
 		</h2>
-		<Checkbox v-model="overrideEnvVars" label="Custom environment variables" class="mb-2.5" />
+		<Checkbox
+			v-model="overrideEnvVars"
+			:label="formatMessage(messages.customEnvironmentVariables)"
+			class="mb-2"
+		/>
 		<StyledInput
 			id="env-vars"
 			v-model="envVars"
 			autocomplete="off"
 			:disabled="!overrideEnvVars"
-			placeholder="Enter environmental variables..."
+			:placeholder="formatMessage(messages.enterEnvironmentVariables)"
 			wrapper-class="w-full"
 		/>
 	</div>
diff --git a/apps/app-frontend/src/composables/useJavaTest.ts b/apps/app-frontend/src/composables/useJavaTest.ts
new file mode 100644
index 000000000..c5209db8d
--- /dev/null
+++ b/apps/app-frontend/src/composables/useJavaTest.ts
@@ -0,0 +1,52 @@
+import { ref } from 'vue'
+
+import { trackEvent } from '@/helpers/analytics'
+import { test_jre } from '@/helpers/jre.js'
+
+export default function useJavaTest() {
+	const testingJava = ref(false)
+	const javaTestResult = ref<boolean | null>(null)
+	let testDebounceTimer: ReturnType<typeof setTimeout> | null = null
+
+	async function runJavaTest(path: string, version: number, track = true) {
+		if (testDebounceTimer) {
+			clearTimeout(testDebounceTimer)
+			testDebounceTimer = null
+		}
+		if (!path) {
+			javaTestResult.value = null
+			return
+		}
+		testingJava.value = true
+		try {
+			javaTestResult.value = await test_jre(path, version)
+		} catch {
+			javaTestResult.value = false
+		}
+		testingJava.value = false
+
+		if (track) {
+			trackEvent('JavaTest', { path, success: javaTestResult.value })
+		}
+	}
+
+	function testJavaInstallationDebounced(path: string, version: number, delay = 600) {
+		if (testDebounceTimer) clearTimeout(testDebounceTimer)
+		if (!path) {
+			javaTestResult.value = null
+			return
+		}
+		testDebounceTimer = setTimeout(() => runJavaTest(path, version, false), delay)
+	}
+
+	async function testJavaInstallation(path: string, version: number, track = false) {
+		await runJavaTest(path, version, track)
+	}
+
+	return {
+		testingJava,
+		javaTestResult,
+		testJavaInstallationDebounced,
+		testJavaInstallation,
+	}
+}
diff --git a/apps/app-frontend/src/helpers/profile.ts b/apps/app-frontend/src/helpers/profile.ts
index 2f865f736..2e69fe319 100644
--- a/apps/app-frontend/src/helpers/profile.ts
+++ b/apps/app-frontend/src/helpers/profile.ts
@@ -147,9 +147,16 @@ export async function get_mod_full_path(path: string, projectPath: string): Prom
 	return await invoke('plugin:profile|profile_get_mod_full_path', { path, projectPath })
 }
 
+export interface JavaVersion {
+	parsed_version: number
+	version: string
+	architecture: string
+	path: string
+}
+
 // Get optimal java version from profile
 // Returns a java version
-export async function get_optimal_jre_key(path: string): Promise<string | null> {
+export async function get_optimal_jre_key(path: string): Promise<JavaVersion | null> {
 	return await invoke('plugin:profile|profile_get_optimal_jre_key', { path })
 }
 
diff --git a/apps/app-frontend/src/locales/en-US/index.json b/apps/app-frontend/src/locales/en-US/index.json
index 51757b059..e6362c6de 100644
--- a/apps/app-frontend/src/locales/en-US/index.json
+++ b/apps/app-frontend/src/locales/en-US/index.json
@@ -611,6 +611,24 @@
   "instance.settings.tabs.java": {
     "message": "Java and memory"
   },
+  "instance.settings.tabs.java.custom-environment-variables": {
+    "message": "Custom environment variables"
+  },
+  "instance.settings.tabs.java.custom-java-arguments": {
+    "message": "Custom Java arguments"
+  },
+  "instance.settings.tabs.java.custom-java-installation": {
+    "message": "Custom Java installation"
+  },
+  "instance.settings.tabs.java.custom-memory-allocation": {
+    "message": "Custom memory allocation"
+  },
+  "instance.settings.tabs.java.enter-environment-variables": {
+    "message": "Enter environmental variables..."
+  },
+  "instance.settings.tabs.java.enter-java-arguments": {
+    "message": "Enter Java arguments..."
+  },
   "instance.settings.tabs.java.environment-variables": {
     "message": "Environment variables"
   },
@@ -626,6 +644,9 @@
   "instance.settings.tabs.java.java-memory": {
     "message": "Memory allocated"
   },
+  "instance.settings.tabs.java.java-path-placeholder": {
+    "message": "/path/to/java"
+  },
   "instance.settings.tabs.window": {
     "message": "Window"
   },