1. Feature ID JD-180 2. Feature Summary Provide users with a reliable, resumable, and verified download system for "Java 180" — a lightweight, optimized Java Runtime Environment (JRE) bundle tailored for legacy enterprise applications. The download process includes integrity checks, platform detection, and background installation options. 3. User Story As a system administrator or Java developer, I want to download the Java 180 bundle with automatic checksum verification and resume support, So that I can reliably deploy a consistent Java version across multiple environments without corrupted downloads or manual validation steps. 4. Acceptance Criteria | ID | Criteria | |----|-----------| | AC-01 | User can initiate download via a single click on “Download Java 180” button | | AC-02 | System automatically detects OS (Windows, macOS, Linux) and suggests correct installer | | AC-03 | Download supports pause/resume after network interruption | | AC-04 | SHA-256 checksum is automatically calculated and matched post-download | | AC-05 | Download progress is displayed in percentage, MB/s, and ETA | | AC-06 | User can choose installation directory before download completes (pre-download setup) | | AC-07 | For headless servers, CLI download mode is available with --no-gui flag | | AC-08 | All downloads are logged to java180_download.log | 5. Technical Specifications 5.1. Download Endpoints | File Type | URL Pattern | Size (approx) | |-----------|-------------|----------------| | Windows x64 Installer | https://dl.java180.com/jre-180-windows-x64.exe | 68 MB | | macOS x64 DMG | https://dl.java180.com/jre-180-macos-x64.dmg | 75 MB | | Linux x64 Tarball | https://dl.java180.com/jre-180-linux-x64.tar.gz | 82 MB | 5.2. Checksums (SHA-256) # Windows a1b2c3d4e5f67890... jre-180-windows-x64.exe macOS f9e8d7c6b5a43210... jre-180-macos-x64.dmg Linux 1a2b3c4d5e6f7890... jre-180-linux-x64.tar.gz 5.3. API for Download Metadata GET /api/v1/download/java180/info
"version": "180.0.1", "releaseDate": "2026-04-14", "files": [ "os": "windows", "arch": "x64", "url": "https://dl.java180.com/jre-180-windows-x64.exe", "size_bytes": 71303168, "sha256": "a1b2c3...", "minRAM_gb": 1 ] java 180 download