Format or beautify Java

Format or beautify your code in Java locally in your browser using WebAssembly.

Format your code now!
// Welcome to HappyFormatter!
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class HappyFormatter {
    public static void main(String[] args) {
        JFrame frame = new JFrame("HappyFormatter");
        frame.add(label);

        JButton button = new JButton("Click Me");
        button.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
          label.setText("Button Clicked!");
      }
        });
        frame.add(button, "South");

        frame.setVisible(true);
    }
}
Valid java
// Welcome to HappyFormatter!
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class HappyFormatter {
  public static void main(String[] args) {
    JFrame frame = new JFrame("HappyFormatter");
    frame.add(label);

    JButton button = new JButton("Click Me");
    button.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        label.setText("Button Clicked!");
      }
    });
    frame.add(button, "South");

    frame.setVisible(true);
  }
}

Java Formatter


Happy Formatter's Java Formatter and Java Validator help to auto format Java code and validate your Java syntax.

  • Java formatter online is the best tool to format Java data.
  • Java validator online is the best tool to validate Java data.
  • It helps to validate Java online with error messages.
  • It's also a Java Beautifier that supports indentation levels: 2 spaces, 3 spaces, and 4 spaces.
  • Supports printing of Java data.
  • Stores data locally for the last Java formatted in the browser's local storage. This can be used as a Notepad++, Sublime, or VSCode alternative for Java beautification.
  • This Java online formatter can also work as Java Lint.
  • Use the auto switch to turn auto-update on or off for beautification.
  • It uses WebAssembly (WASM) to beautify Java, making it easy for a human to read and analyze.
  • Download Java once it's created or modified, and it can be opened in Notepad++, Sublime, or VSCode alternative.
  • Java Format Checker helps to fix the missing quotes; click the setting icon which looks like a screwdriver on the left side of the editor to fix the format.

Know more about java:

  • Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.
  • It is a general-purpose programming language intended to let application developers write once, run anywhere (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation.
  • Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture.
  • The syntax of Java is similar to C and C++, but has fewer low-level facilities than either of them.

Java Validator


Java Validator Online checks the integrity/syntax of the Java data based on Java Specifications.

  • It's super easy to find the error when line numbers are highlighted with an in-detail error description.
  • Use the format button as a Java Fixer to repair the error.
  • To validate Java you just need internet and no need to install any software.
  • Your Java data gets validated in the browser itself.

Frequently Asked Questions

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