用java画直线

package 绘制图形;

import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;
//画直线
public class Line extends JFrame{
    public static void main(String args[]) {
        JFrame win = new JFrame("画线");
        win.add(new DrawLinePanel());
        win.setVisible(true);
    }
    

}
class DrawLinePanel extends JPanel{
    public void paint(Graphics g) {
        //几个参数表示起点的坐标与终点的坐标
        g.drawLine(70, 50, 180, 50);
        g.drawLine(70, 80, 180, 80);
        g.drawLine(110, 10, 140, 120);
    }
}

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画直线.png