java-beginner

package sample;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class HelloWorldJavaFX extends Application {

java-beginner

package sample;

import javax.swing.JFrame;
import javax.swing.JLabel;

public class HelloWorldSwing  extends JFrame {

    public static void main(String[] args) {

        new HelloWorldSwing().init();

java-beginner

package sample;

import java.applet.Applet;
import java.awt.Graphics;

public class HelloWorldApplet extends Applet {

    public void paint(Graphics g) {

        g.drawString("Hello World.", 10, 10);

java-beginner

package sample;

public class HelloWorldPrintf {

    public static void main(String[] args) {

        System.out.printf("%s %s", "Hello", "world.");

    }

java-beginner

package sample;

public class HelloWorldStringBuilder {

    public static void main(String[] args) {

        StringBuilder sb = new StringBuilder();
        sb.append("Hello");
        sb.append(" ");
        sb.append("World.");

java-beginner

package sample;

public class HelloWorldString {

    public static void main(String[] args) {

        String s = "Hello World.";
        System.out.println(s);

    }

java-beginner

package sample;

public class HelloWorldStandard {

    public static void main(String[] args) {

        System.out.println("Hello World.");

    }

java-beginner

package sample;

public class HelloWorldReverse {

    public static void main(String[] args) {

        char[] chars = {0x02D9, 0x0070, 0x006C, 0x006F, 0x0279, 0x004D, 0x0020, 0x006F, 0x006C, 0x006C, 0x0259, 0x0048};

        System.out.println(new String(chars));

java-beginner

package sample;

public class HelloWorldPrint {

    public static void main(String[] args) {

        System.out.print("Hello");
        System.out.print(" ");
        System.out.print("world.");

java-beginner

package sample;

public class HelloWorldChar {

    public static void main(String[] args) {

        char[] chars = {'H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd', '.'};

        System.out.println(chars);