import java.awt.*;
import javax.swing.*;
import java.awt.geom.*;public class Draw_tendency extends JPanel{
//构造函数
public Draw_tendency() {
super();
//使部件变得透明
setOpaque(true);
//setLayout(new BorderLayout());
setBorder(BorderFactory.createLineBorder(Color.black));
setBackground(Color.blue);
} protected void paintComponent(Graphics g) {
int i =10;
for (int j = 0; j < 20; j++) {
Color c = new Color( (int) (Math.random() * 0xffffff));
g.setColor(c);
g.drawString("i am a boy!", 50 + i, 50 + i);
i += 20;
}
}
}我想把背景色设置成黑色的,可是不成功~`如何解决?
import javax.swing.*;
import java.awt.geom.*;public class Draw_tendency extends JPanel{
//构造函数
public Draw_tendency() {
super();
//使部件变得透明
setOpaque(true);
//setLayout(new BorderLayout());
setBorder(BorderFactory.createLineBorder(Color.black));
setBackground(Color.blue);
} protected void paintComponent(Graphics g) {
int i =10;
for (int j = 0; j < 20; j++) {
Color c = new Color( (int) (Math.random() * 0xffffff));
g.setColor(c);
g.drawString("i am a boy!", 50 + i, 50 + i);
i += 20;
}
}
}我想把背景色设置成黑色的,可是不成功~`如何解决?
代表城管来接分(怕了吧?)。
不给就抢,一天一次...