一.程序代码

 

package jisuanqi2;

 

import java.awt.*;

 

import javax.swing.*;

 

import java.awt.event.*;

 

public class Jisuanqi extends Frame implements ActionListener{

 

public Jisuanqi() {

 

super("计算器");

 

Frame ff=new Frame("framework test");

 

ff.setSize(400,100);

 

ff.setLocation(300,240);

 

ff.setLayout(new FlowLayout());

 

final TextField f1=new TextField("10",8);

 

ff.add(f1);

 

//this.add(new Label("+"));

 

Label l1=new Label("+");

 

ff.add(l1);

 

//this.add(new TextField("20",8));

 

TextField f2=new TextField("20",8);

 

ff.add(f2);

 

//this.add(new Button("="));

 

Button b1=new Button("=");

 

ff.add(b1);

 

//this.add(new TextField(10));

 

TextField f3=new TextField(10);

 

ff.add(f3);

 

ff.addWindowListener(new myclose());

 

ff.setVisible(true);

 

b1.addActionListener(new ActionListener()

 

{public void actionPerformed(ActionEvent e)

 

{double c;

 

String s1=f1.getText();

 

double a=Integer.parseInt(s1);

 

String s2=f2.getText();

 

double b=Integer.parseInt(s2);

 

c=a+b;

 

String m=String.valueOf(c);

 

f3.setText(m)}

 

private double Integer(String s) {

 

return 0;

 

}

 

});

 

}

 

class myclose implements WindowListener{

 

public void windowActivated(WindowEvent arg0) {

 

}

 

public void windowClosed(WindowEvent arg0) {

 

// TODO Auto-generated method stub

 

}

 

public void windowClosing(WindowEvent arg0) {

 

System.exit(0);

 

}

 

public void windowDeactivated(WindowEvent arg0) {

 

}

 

public void windowDeiconified(WindowEvent arg0) {

 

}

 

public void windowIconified(WindowEvent arg0) {

 

}

 

public void windowOpened(WindowEvent arg0) {

 

}

 

}

 

public static void main(String[] args) {

 

new Jisuanqi();

 

}

 

public void actionPerformed(ActionEvent arg0) {

 

}

 

}二.实验心得

 

       本次实验在上一次实验的基础上添加新的功能，用以实现

 

为控件加监测实现驱动。在编写过程中遇到很多问题，不过在

 

同学的帮助下解决了。对图形界面知识点的掌握还是不够熟练,

 

实验十二

package ziwojieshao;

 

import java.awt.FlowLayout;

 

import javax.swing.*;

 

import java.awt.Container;

 

import java.awt.event.ActionEvent;

 

import java.awt.event.ActionListener;

 

public class AA extends JFrame{

 

public AA()

 

{

 

JFrame jf1=new JFrame ("Hellow");

 

jf1.setLayout(new FlowLayout());

 

jf1.getContentPane().add(new JButton("姓名")) ;

 

jf1.getContentPane().add(new JTextField("陈香明",10)) ;

 

JRadioButton j1=new JRadioButton("女",true);

 

JRadioButton j2=new JRadioButton("男");

 

ButtonGroup g=new ButtonGroup();

 

g.add(j1);

 

g.add(j2);

 

JPanel p1=new JPanel();

 

p1.add(j1);

 

p1.add(j2);

 

jf1.getContentPane().add(p1);

 

jf1.setSize(320,210);

 

String proList[] = { "年龄","民族" ,"籍贯","学号","学院","专业"};

 

JComboBox comboBox;

 

Container conPane = getContentPane(); 

 

comboBox = new JComboBox(proList); 

 

comboBox.setEditable(true); 

 

conPane.add(comboBox);

 

JTextField b=new JTextField(20);

 

jf1.add(conPane);

 

jf1.add(b);

 

comboBox.addActionListene

r(new ActionListener()

 

{public void actionPerformed(Actio

 nListener(new ActionListener()

 

{public void actionPerformed(ActionEvent e)

 

{ 

 

if(comboBox.getSelectedItem().equals("年龄"))

 

b.setText("19");

 

else if(comboBox.getSelectedItem().equals("民族"))

 

b.setText("汉");

 

else if(comboBox.getSelectedItem().equals("籍贯"))

 

b.setText("青海西宁");

 

else if(comboBox.getSelectedItem().equals("学号"))

 

b.setText("20173311106");

 

else if(comboBox.getSelectedItem().equals("学院"))

 

b.setText("计算机学院");

 

else if(comboBox.getSelectedItem().equals("专业"))

 

b.setText("网络工程");

 

}

 

});

 

jf1.setVisible(true);

 

} 

 

public static void main (String[] args) {

 

new AA()

 

; }

 

}

 

二.实验心得

 

        一开始没有对输入流输入的字符串转换为double型数据，

 

导致不能转换，采用转为double型，并抛出异常后解决了这个问题。