java swing如何在窗体里添加一组按钮
import java.awt.*;
import javax.swing.*;
public class CalenderDay {
private static final int width=7;
private static final int height=6;
private JPanel jpanel;
private JButton[][] buttonday=new JButton[width][height];
public CalenderDay(JFrame frame)
{
jpanel=new JPanel();
for(int i=1;i<=height;i++)
{
for(int j=1;j<=width;j++)
{
buttonday[i-1][j-1].setText("22");
buttonday[i-1][j-1].setSize(50, 40);
buttonday[i-1][j-1].setLocation((j-1)*50, 130+(i-1)*40);
jpanel.add(buttonday[i-1][j-1]);
}
}
frame.add(jpanel);
}
}
//大家帮忙看一下为什么我这样定义数组按钮显示不出来?是想做万年历的,每个日期用一个按钮表示。
//该怎么定义一组按钮呢?