import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Graphics;
public class TankWar extends JPanel{
private int x=50,y=50;
public TankWar(){
//this.setBackground(Color.GRAY);
}
protected void painComponent (Graphics g){
super.paintComponent(g);
Color c=g.getColor();
g.setColor(Color.red);
g.drawString("hello", 20, 40);
g.fillOval(x, y, 30, 30);
g.setColor(c);
//x+=5;
}
public static void main(String[] args){
JFrame jf=new JFrame("坦克游戏");
TankWar t=new TankWar();
jf.getContentPane().add(t);
jf.setResizable(false);
jf.setSize(800, 600);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
jf.validate();
}
}
为什么画出的图形都不显示呢??
import javax.swing.JPanel;
import java.awt.Color;
import java.awt.Graphics;
public class TankWar extends JPanel{
private int x=50,y=50;
public TankWar(){
//this.setBackground(Color.GRAY);
}
protected void painComponent (Graphics g){
super.paintComponent(g);
Color c=g.getColor();
g.setColor(Color.red);
g.drawString("hello", 20, 40);
g.fillOval(x, y, 30, 30);
g.setColor(c);
//x+=5;
}
public static void main(String[] args){
JFrame jf=new JFrame("坦克游戏");
TankWar t=new TankWar();
jf.getContentPane().add(t);
jf.setResizable(false);
jf.setSize(800, 600);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setVisible(true);
jf.validate();
}
}
为什么画出的图形都不显示呢??
package com.gloomyfish.swing.rounedpanel;import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;import javax.swing.JFrame;
import javax.swing.JPanel;public class TankWar extends JPanel {
/**
*
*/
private static final long serialVersionUID = -368574037499289446L;
private int x = 50, y = 50; public TankWar() {
// this.setBackground(Color.GRAY); } protected void paintComponent(Graphics g) {
// super.paintComponent(g);
Color c = g.getColor();
g.setColor(Color.red);
g.fillOval(x, y, 30, 30);
g.setColor(c);
g.drawString("hello", 20, 40);
// x+=5;
} public static void main(String[] args) {
JFrame jf = new JFrame("坦克游戏");
TankWar t = new TankWar();
jf.setResizable(false);
jf.setSize(800, 600);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.getContentPane().setLayout(new BorderLayout());
jf.getContentPane().add(t, BorderLayout.CENTER);
jf.setVisible(true);
// jf.validate();
}
}