fund.java

不错的课件陈述设计一个汇编程序。实现下列功能1.实现加、减、乘、除以及取余的计算程序。2.接受由键盘输入的十进制数。3.计算结果以十进制数输出。

import java.awt.*;
import java.awt.event.*;
import java.lang.*;

public  class  Fund implements TextListener,ActionListener{//*

Frame f;
Panel p1,p2,p3;
Label lbl[];
TextField tf[] ;
Button btn[];
String lblcaption []={"本金","年利率","利息小计","利息合计"}; 
String ss;

public static void main(String args[]){
Fund fund = new Fund(); 
fund.go();
 }
 
  public  void go(){	
 f=new Frame();
 p1=new Panel();
 p2=new Panel();
 p3=new Panel();
 lbl=new Label[4];
 tf= new TextField[7];
 btn=new Button[2];                                          
   	
   f.setSize(350,200);
   Font ft=new Font("Times",Font.PLAIN,24);
   
  p1.setLayout(new GridLayout(3,3,3,3));//Panel上设立Layout
 
  for(int i=0;i<=3;i++){//标签设立名称
     lbl[i]=new Label(lblcaption[i]);
  	  }  

   for(int i=0;i<=2;i++){//panel加入标签
  	p1.add(lbl[i]);
  	  }  

  for(int i=0;i<=5;i++){//panel加入标签
  	tf[i]=new TextField(5);
  	tf[i].setText("0");  	
   	p1.add(tf[i]);
  } 
 
    tf[1].addTextListener(this);//TextField事件监听
    tf[4].addTextListener(this);//TextField事件监听
     
    f.add(p1,BorderLayout.NORTH);
   	p2.add(lbl[3]);
  	tf[6]=new TextField(10);
  	tf[6].setText("0");
  	
   	p2.add(tf[6]); 	   	  
       f.add(p2,BorderLayout.CENTER);
   
   
   btn[0]=new Button("清除");	
   btn[1]=new Button("结束");
   btn[0].addActionListener(this); 
   btn[1].addActionListener(this);  
   p3.add(btn[0]);
   p3.add(btn[1]);
   
   f.add(p3,BorderLayout.SOUTH);  	
   f.setVisible(true); 
}

public void textValueChanged(TextEvent te){//#TextField事件

String tf0,tf1,int1,int2,int3;
double interest1,interest2,interest3,tf0value,tf1value;
  tf0=tf[0].getText();
  tf1=tf[1].getText();
  tf0value=Double.parseDouble(tf0);
  tf1value=Double.parseDouble(tf1);
  interest1=tf0value*tf1value;
   int1= Double.toString(interest1);
   tf[2].setText(" "+int1);
   
   tf0=tf[3].getText();
  tf1=tf[4].getText();
  tf0value=Double.parseDouble(tf0);
  tf1value=Double.parseDouble(tf1);
  interest2=tf0value*tf1value;
   int2= Double.toString(interest2);
   tf[5].setText(""+int2);
   
   interest3=interest1+interest2;
   int3= Double.toString(interest3);
   tf[6].setText(""+int3);
  }//#

public void actionPerformed(ActionEvent ae ){
	String ss;
	ss=ae.getActionCommand();
	
	if (ss.equals("清除")){
   		for(int i=0;i<=6;i++){
  		tf[i].setText("0");
  		}
  	} 
  	else {
  		System.exit(0);
  	}
   }
}