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。