Question

请帮我改一下这个java程序的一个错误！谢谢

show.inFrame(new Borders(), 500, 300);这里有错误！请帮忙改正！谢谢！

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class Borders extends JPanel {
static JPanel showBorder(Border b) {
JPanel jp = new JPanel();
jp.setLayout(new BorderLayout());
String nm = b.getClass().toString();
nm = nm.substring(nm.lastIndexOf('.') + 1);
jp.add(new JLabel(nm, JLabel.CENTER),
BorderLayout.CENTER);
jp.setBorder(b);
return jp;
}
public Borders() {
setLayout(new GridLayout(2,4));
add(showBorder(new TitledBorder("Title")));
add(showBorder(new EtchedBorder()));
add(showBorder(new LineBorder(Color.blue)));
add(showBorder(
new MatteBorder(5,5,30,30,Color.green)));
add(showBorder(
new BevelBorder(BevelBorder.RAISED)));
add(showBorder(
new SoftBevelBorder(BevelBorder.LOWERED)));
add(showBorder(new CompoundBorder(
new EtchedBorder(),
new LineBorder(Color.red))));
}
public static void main(String args[]) {
show.inFrame(new Borders(), 500, 300);
}
}

Answer 1

最后的main函数修改如下：
public static void main(String args[]) {
JFrame MainFrome=new JFrame();
MainFrome.setSize(500,300);

Borders border_s=new Borders();
MainFrome.add(border_s);

MainFrome.setVisible(true);
}

Answer 2

没有创建 show这个变量