hellojava1.java

learning java的源代码。书中每个实例都有相关的代码example。

//file: HelloJava1.java
public class HelloJava1 extends javax.swing.JComponent {

  public static void main(String[] args) {
    javax.swing.JFrame f = new javax.swing.JFrame("HelloJava1");
    f.setSize(300, 300);
    f.getContentPane().add(new HelloJava1(  ));
    f.setVisible(true);
  }

  public void paintComponent(java.awt.Graphics g) {
    g.drawString("Hello, Java!", 125, 95);
  }
}