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JavaRunner
File size: 4,885 Bytes 
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Java IDE (HF)</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/codemirror.min.css">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/codemirror.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/mode/clike/clike.min.js"></script>
  <style>
    body { display: flex; margin: 0; font-family: Arial; background: #121212; color: #eee; height: 100vh; }
    #files { width: 200px; background: #1e1e1e; padding: 10px; border-right: 2px solid #333; overflow-y: auto; }
    #files button { display: block; width: 100%; margin: 5px 0; padding: 8px; background: #333; border: none; color: white; cursor: pointer; border-radius: 5px; text-align: left; }
    #files button.active { background: #4CAF50; }
    #editor-container { flex: 1; display: flex; flex-direction: column; }
    #editor { flex: 1; border-bottom: 2px solid #333; }
    #controls { padding: 10px; background: #1e1e1e; display: flex; gap: 10px; }
    button { border: none; padding: 10px; border-radius: 5px; cursor: pointer; }
    #run { background: #4CAF50; color: white; }
    #save { background: #2196F3; color: white; }
    #download { background: #FF9800; color: white; }
    #delete { background: #f44336; color: white; }
    #output { padding: 10px; background: #222; white-space: pre-wrap; height: 150px; overflow-y: auto; }
  </style>
</head>
<body>
  <div id="files">
    <h3>Files</h3>
    <button onclick="newFile()">+ New File</button>
    <div id="file-list"></div>
  </div>

  <div id="editor-container">
    <div id="editor"></div>
    <div id="controls">
      <button id="run" onclick="runCode()">▶ Run</button>
      <button id="save" onclick="saveFile()">💾 Save</button>
      <button id="download" onclick="downloadFile()">⬇ Download</button>
      <button id="delete" onclick="deleteFile()">🗑 Delete</button>
    </div>
    <pre id="output"></pre>
  </div>

  <script>
    let editor = CodeMirror(document.getElementById("editor"), {
      mode: "text/x-java",
      theme: "default",
      lineNumbers: true,
      indentUnit: 4,
      tabSize: 4
    });

    let files = JSON.parse(localStorage.getItem("javaFiles") || "{}");
    let currentFile = null;

    function renderFiles() {
      let list = document.getElementById("file-list");
      list.innerHTML = "";
      Object.keys(files).forEach(name => {
        let btn = document.createElement("button");
        btn.textContent = name;
        if (name === currentFile) btn.classList.add("active");
        btn.onclick = () => openFile(name);
        list.appendChild(btn);
      });
    }

    function newFile() {
      let name = prompt("Enter file name (with .java):", "Main.java");
      if (!name.endsWith(".java")) return alert("File must end with .java");
      if (files[name]) return alert("File already exists");
      files[name] = "// New Java file\nclass " + name.replace(".java", "") + " {\n    public static void main(String[] args) {\n        System.out.println(\"Hello " + name + "!\");\n    }\n}";
      currentFile = name;
      saveStorage();
      renderFiles();
      openFile(name);
    }

    function openFile(name) {
      currentFile = name;
      editor.setValue(files[name]);
      renderFiles();
    }

    function saveFile() {
      if (!currentFile) return alert("No file open");
      files[currentFile] = editor.getValue();
      saveStorage();
      alert("✅ File saved");
    }

    function deleteFile() {
      if (!currentFile) return;
      if (confirm("Delete " + currentFile + "?")) {
        delete files[currentFile];
        currentFile = null;
        saveStorage();
        renderFiles();
        editor.setValue("");
      }
    }

    function downloadFile() {
      if (!currentFile) return;
      let blob = new Blob([editor.getValue()], {type: "text/plain"});
      let link = document.createElement("a");
      link.href = URL.createObjectURL(blob);
      link.download = currentFile;
      link.click();
    }

    async function runCode() {
      if (!currentFile) return alert("No file open");
      saveFile();
      document.getElementById("output").innerText = "⏳ Running...";
      const res = await fetch("/run-java", {
        method: "POST",
        headers: {"Content-Type": "application/json"},
        body: JSON.stringify({code: editor.getValue(), filename: currentFile})
      });
      const data = await res.json();
      document.getElementById("output").innerText = data.output;
    }

    function saveStorage() {
      localStorage.setItem("javaFiles", JSON.stringify(files));
    }

    // Load last state
    renderFiles();
    if (Object.keys(files).length > 0) {
      currentFile = Object.keys(files)[0];
      openFile(currentFile);
    }
  </script>
</body>
</html>