计算器

最新推荐文章于 2025-09-10 22:21:01 发布

weixin_30783913

最新推荐文章于 2025-09-10 22:21:01 发布

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CC 4.0 BY-SA版权

文章标签： java

原文链接：http://www.cnblogs.com/yaozoutu/p/11126672.html

package cuko;
 
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.GridLayout;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
 
public class 计算机界面 {
JFrame f;
JButton b[];
JPanel p;
GridLayout g;
JTextField t;
String a[]= {"7","8","9","/","4","5","6","*","1","2","3","-","0",".","=","+"};
   public 计算机界面() {
      f=new JFrame("计算器");
       
      t=new JTextField();
       
      p=new JPanel();
      p.setBackground(Color.GRAY);
       
       g=new   GridLayout(4,4);
       p.setLayout(g);
       b=new JButton[a.length];
      for(int i=0;i<16;i++)
           
      {b[i]=new JButton(a[i]);
         // p.add(a[i]);
      p.add(b[i]);//把吧b[]加入面板p中
      }      
      f.add(t,BorderLayout.NORTH);//设置一个分格的，作用把文本框放在最上面
      f.add(p,BorderLayout.CENTER);//把网格布局放在下面，实现计算器的分布
        
       f.setSize(300,280);
       f.setVisible(true);
        
       p.setLayout(g);
        
       f.add(p);
 
   }
public static void main(String[] args) {
     new 计算机界面();
}
 
}

package cuko;
 
 
 
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
 
public class 换颜色的窗体 {
    JFrame jf;
    JPanel[] jp;
    JButton[] jb;
    public 换颜色的窗体()
    {
        jf = new JFrame();
        jp = new JPanel[2];
        for(int i =0; i<jp.length; i++)
        {
            jp[i] = new JPanel();
        }
        jb = new JButton[4];
        jb[0] = new JButton("红色");
        jb[1] = new JButton("绿色");
        jb[2] = new JButton("蓝色");
        jb[3] = new JButton("自定义色");
        for(int i =0; i<jb.length; i++)
        {
            jp[0].add(jb[i]);
        }
        jf.add("North", jp[0]);
        jf.add("Center", jp[1]);
        jb[0].addActionListener(new ActionListener(){
           // @Override
            public void actionPerformed(ActionEvent e){
                jp[1].setBackground(Color.RED);
            }});
        jb[1].addActionListener(new ActionListener(){
           // @Override
            public void actionPerformed(ActionEvent e){
                jp[1].setBackground(Color.GREEN);
            }});
        jb[2].addActionListener(new ActionListener(){
            //@Override
            public void actionPerformed(ActionEvent e){
                jp[1].setBackground(Color.BLUE);
            }});jb[3].addActionListener(new ActionListener(){
                //@Override
                public void actionPerformed(ActionEvent e){
                    jp[1].setBackground( new Color(0,255,255));//自定义颜色范围在0到255
                }});
      jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setSize(300, 200);
        jf.setVisible(true);
    }
    public static void main(String[] args) {
        new 换颜色的窗体();
    }
     
}