Add Java Budget Tracker CLI Application

budget-tracker/.gitignore

@@ -0,0 +1,8 @@
+build/
+.gradle/
+*.class
+*.jar
+*.log
+budget_data.json
+.idea/
+*.iml

budget-tracker/build.gradle

@@ -0,0 +1,72 @@
+plugins {
+    id 'java'
+    id 'application'
+    id 'jacoco'
+    id 'checkstyle'
+}
+
+group = 'com.budgettracker'
+version = '1.0.0'
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_21
+    targetCompatibility = JavaVersion.VERSION_21
+}
+
+application {
+    mainClass = 'com.budgettracker.BudgetTrackerApp'
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'com.google.code.gson:gson:2.10.1'
+
+    testImplementation 'org.junit.jupiter:junit-jupiter:5.10.2'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}
+
+jacoco {
+    toolVersion = '0.8.11'
+}
+
+jacocoTestReport {
+    dependsOn test
+    reports {
+        xml.required = true
+        html.required = true
+    }
+}
+
+jacocoTestCoverageVerification {
+    dependsOn jacocoTestReport
+    violationRules {
+        rule {
+            limit {
+                counter = 'LINE'
+                value = 'COVEREDRATIO'
+                minimum = 0.80
+            }
+        }
+    }
+}
+
+checkstyle {
+    toolVersion = '10.14.2'
+    maxWarnings = 0
+}
+
+tasks.withType(Checkstyle).configureEach {
+    reports {
+        xml.required = true
+        html.required = true
+    }
+}
+
+check.dependsOn jacocoTestCoverageVerification

budget-tracker/config/checkstyle/checkstyle.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+    "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+    "https://checkstyle.org/dtds/configuration_1_3.dtd">
+<module name="Checker">
+    <module name="TreeWalker">
+        <module name="UnusedImports"/>
+        <module name="RedundantImport"/>
+        <module name="NeedBraces"/>
+        <module name="LeftCurly"/>
+        <module name="RightCurly"/>
+    </module>
+</module>

budget-tracker/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.7-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists