package jisuanqi;import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
//import java.lang.*;
public class Calculator extends JFrame { public static void main(String[] args)
{
Calculator frame=new Calculator();
frame.setTitle("计算器");
frame.setSize(440, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
JTextField result=new JTextField();
//l1.add(result);
result.setHorizontalAlignment(JTextField.RIGHT );
frame.setLayout(new BorderLayout(15,15));
JButton b1=new JButton("1");
JButton b2=new JButton("2");
JButton b3=new JButton("3");
JButton b4=new JButton("4");
JButton b5=new JButton("5");
JButton b6=new JButton("6");
JButton b7=new JButton("7");
JButton b8=new JButton("8");
JButton b9=new JButton("9");
JButton b0=new JButton("0");
JButton b00=new JButton("00");
b00.setLayout(null);
b00.setBounds(36, 72, 63, 20);
b1.setLayout(null);
b1.setBounds(3, 3, 30, 20);
b2.setLayout(null);
b2.setBounds(36, 3, 30, 20);
b3.setLayout(null);
b3.setBounds(69, 3, 30, 20);
b4.setLayout(null);
b4.setBounds(3, 26, 30, 20);
b5.setLayout(null);
b5.setBounds(36, 26, 30, 20);
b6.setLayout(null);
b6.setBounds(69, 26, 30, 20);
b7.setLayout(null);
b7.setBounds(3, 49, 30, 20);
b8.setLayout(null);
b8.setBounds(36, 49, 30, 20);
b9.setLayout(null);
b9.setBounds(69, 49, 30, 20);
b0.setLayout(null);
b0.setBounds(3, 72, 30, 20);
JPanel l1=new JPanel(null);
// new GridLayout(4,3,5,10)
l1.add(b1);
l1.add(b2);
l1.add(b3);
l1.add(b4);
l1.add(b5);
l1.add(b6);
l1.add(b7);
l1.add(b8);
l1.add(b9);
l1.add(b0);
l1.add(b00);
frame.add(result,BorderLayout.NORTH );
frame.add(l1,BorderLayout.WEST);
b1.setVisible(true);
l1.setVisible(true);
frame.setVisible(true);
}
}
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
//import java.lang.*;
public class Calculator extends JFrame { public static void main(String[] args)
{
Calculator frame=new Calculator();
frame.setTitle("计算器");
frame.setSize(440, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
JTextField result=new JTextField();
//l1.add(result);
result.setHorizontalAlignment(JTextField.RIGHT );
frame.setLayout(new BorderLayout(15,15));
JButton b1=new JButton("1");
JButton b2=new JButton("2");
JButton b3=new JButton("3");
JButton b4=new JButton("4");
JButton b5=new JButton("5");
JButton b6=new JButton("6");
JButton b7=new JButton("7");
JButton b8=new JButton("8");
JButton b9=new JButton("9");
JButton b0=new JButton("0");
JButton b00=new JButton("00");
b00.setLayout(null);
b00.setBounds(36, 72, 63, 20);
b1.setLayout(null);
b1.setBounds(3, 3, 30, 20);
b2.setLayout(null);
b2.setBounds(36, 3, 30, 20);
b3.setLayout(null);
b3.setBounds(69, 3, 30, 20);
b4.setLayout(null);
b4.setBounds(3, 26, 30, 20);
b5.setLayout(null);
b5.setBounds(36, 26, 30, 20);
b6.setLayout(null);
b6.setBounds(69, 26, 30, 20);
b7.setLayout(null);
b7.setBounds(3, 49, 30, 20);
b8.setLayout(null);
b8.setBounds(36, 49, 30, 20);
b9.setLayout(null);
b9.setBounds(69, 49, 30, 20);
b0.setLayout(null);
b0.setBounds(3, 72, 30, 20);
JPanel l1=new JPanel(null);
// new GridLayout(4,3,5,10)
l1.add(b1);
l1.add(b2);
l1.add(b3);
l1.add(b4);
l1.add(b5);
l1.add(b6);
l1.add(b7);
l1.add(b8);
l1.add(b9);
l1.add(b0);
l1.add(b00);
frame.add(result,BorderLayout.NORTH );
frame.add(l1,BorderLayout.WEST);
b1.setVisible(true);
l1.setVisible(true);
frame.setVisible(true);
}
}
解决方案 »
- 使用delete+insert语句比直接用update语句到底能否提高效率,请教?
- struts1.3中的防止重复提交的机制Token的问题,求知道?
- 菜鸟求助!!自己调了大半天了还是没有解决!
- ibatis中调用getSqlMapClient().insert,结果报NullpointExcepton错,怎么改?
- 帮忙看看这个翻页技术!!
- 参加武汉达内java培训,有经验的给点意见啊,感谢!广告请绕行!
- Java代码优化问题
- 北京 聘LBS
- 批量更新数据的一点疑问(Hibernate2.1)
- ????????高分求救!!!怎样在linux下配置tomcat文件?同时配置sqlServer数据库?
- myeclipse8.6和struts2.2不兼容???老是报莫名其妙的错啊
- 跪求解决Spring与Hibernate的整合问题!!??
import java.awt.event.*;
import javax.swing.*;
import java.util.*;public class Calculator { public static void main(String[] args)
{
JFrame frame= new JFrame("计算器");
frame.setSize(440, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
JTextField result=new JTextField(); result.setHorizontalAlignment(JTextField.RIGHT ); JButton b1=new JButton("1"); JButton b2=new JButton("2");
JButton b3=new JButton("3");
JButton b4=new JButton("4");
JButton b5=new JButton("5");
JButton b6=new JButton("6");
JButton b7=new JButton("7");
JButton b8=new JButton("8");
JButton b9=new JButton("9");
JButton b0=new JButton("0");
JButton b00=new JButton("00"); b00.setBounds(36, 72, 63, 20); b1.setBounds(3, 3, 30, 20); b2.setBounds(36, 3, 30, 20); b3.setBounds(69, 3, 30, 20); b4.setBounds(3, 26, 30, 20); b5.setBounds(36, 26, 30, 20); b6.setBounds(69, 26, 30, 20); b7.setBounds(3, 49, 30, 20); b8.setBounds(36, 49, 30, 20); b9.setBounds(69, 49, 30, 20); b0.setBounds(3, 72, 30, 20); JPanel l1=new JPanel(null); l1.add(b1);
l1.add(b2);
l1.add(b3);
l1.add(b4);
l1.add(b5);
l1.add(b6);
l1.add(b7);
l1.add(b8);
l1.add(b9);
l1.add(b0);
l1.add(b00); frame.add(result,BorderLayout.NORTH );
frame.add(l1,BorderLayout.CENTER);
b1.setVisible(true);
l1.setVisible(true);
frame.setVisible(true);
}
}JFrame 默认就是 BorderLayout,没必要再设置。
JButton 设置布局管理器没意义。
JButton的大小设置的太小了。
把放置JButton的JPanel 放在 JFrame的 BorderLayout.CENTER