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[Java教程]java工具类之Graphics


利用重写paint()方法绘画出一个坐标轴:

package huaxian;import java.awt.Color;import java.awt.FlowLayout;import java.awt.Graphics;import javax.swing.JFrame;import javax.swing.JPanel;public class huaxian2 extends JFrame {  private JPanel jp;  private JFrame jf;    public static void main(String[] args) {    // TODO Auto-generated method stub    huaxian2 h2 = new huaxian2();  }    public huaxian2(){        this.setSize(500, 500);    this.setVisible(true);    this.setDefaultCloseOperation(jf.EXIT_ON_CLOSE);        jp = new JPanel();    this.add(jp);      }    @Override  public void paint(Graphics g){    super.paint(g);    g.drawLine(50, 350, 498, 350);    g.drawLine(50, 50, 50, 350);  }}

  点击运行结果: