Java的一个小程序

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class  TalkBrower  extends JFrame{

JTextArea jtaA = new JTextArea();
JTextArea jtaC = new JTextArea();
JScrollPane jspA = new JScrollPane(jtaA);
JScrollPane jspC = new JScrollPane(jtaC);

public void CreateJFrame(String title){

JFrame jf = new JFrame(title);
Container  container = jf.getContentPane();
container.setBackground(new Color(255,106,106));
jf.setTitle("Talk With Machine");
//final int WIDTH = 500;
//final int HEIGHT = 500;
//jf.setSize(WIDTH,HEIGHT);
jf.setBounds(300, 150, 500, 500);
jf.setResizable(false);
jf.setLayout(null);
jf.setVisible(true);
jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//设置按键
JButton btnSend=new JButton("发送");
JButton btnClear=new JButton("清除");
JButton btnExit=new JButton("退出");
btnSend.setBounds(250,410,70,40);
btnClear.setBounds(330,410,70,40);
btnExit.setBounds(410,410,70,40);
container.add(btnSend);
container.add(btnClear);
container.add(btnExit);

jtaA.setFont(new Font("Simhei",0,18));
jtaA.setAutoscrolls(true);
jspA.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
container.add(jspA);
jspA.setBounds(30, 280, 430, 110);

jtaC.setLineWrap(true);
jtaC.setEditable(true);
jtaC.setFont(new Font("Simhei",0,18));
jspC.setBounds(30, 20, 430, 250);
jtaC.setAutoscrolls(true);
jspC.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
container.add(jspC);

jtaC.append("Robot: Hi! I am Robot."+"\n");

btnSend.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
jtaC.setCaretPosition(jtaC.getDocument().getLength());
try{
String Send = jtaA.getText();
jtaC.append("You: "+Send+"\n");
if(Send.indexOf("Hello")!=-1){
jtaC.append("Robot: How is it going !"+"\n");
}else if(Send.indexOf("am happy")!=-1){
jtaC.append("Robot: What happened today !"+"\n");
}else if(Send.indexOf("I need")!=-1){
int size = Send.indexOf("I need");
int beginIndex = size+6;
String subSend = Send.substring(beginIndex);
jtaC.append("Robot: Are you sure you need "+subSend+"?"+"\n");
}else if(Send.indexOf("I can't")!=-1){
int size=Send.indexOf("I can't");
int beginIndex=size+7;
String subSend=Send.substring(beginIndex);
jtaC.append("Robot: Perhaps you could  "+subSend+"if you tried."+"\n");
}else if(Send.indexOf("Are you")!=-1){
int size=Send.indexOf("Are you");
int beginIndex=size+7;
String subSend=Send.substring(beginIndex);
jtaC.append("Robot:Why does it matter whether I am"+subSend+"?"+"\n");
}else if(Send.indexOf("What")!=-1){
jtaC.append("Robot:What do you think!"+"\n");
}else if(Send.indexOf("Yes")!=-1){
jtaC.append("Robot:You seem quite sure"+"\n");
}else if(Send.indexOf("I feel")!=-1){
jtaC.append("Robot:Good,tell me more about these feelings"+"\n");
}else if(Send.indexOf("You")!=-1){
jtaC.append("Robot:Why do you say that about me？"+"\n");
}else if(Send.indexOf("Why")!=-1){
jtaC.append("Robot:Why do you think so ？"+"\n");
}

else if(Send.indexOf("Beacuse")!=-1){
jtaC.append("Robot:Is that the real reasons ？"+"\n");
}else if(Send.indexOf("I want")!=-1){
int size=Send.indexOf("I want");
int beginIndex=size+6;
String subSend=Send.substring(beginIndex);
jtaC.append("Robot:Why do you want"+subSend+"?"+"\n");
}else if(Send.indexOf("quit")!=-1){
jtaC.append("Robot:Thank you for talking with me."+"\n");
}else if(Send.indexOf(",")!=-1){
jtaC.append("Robot:Please tell me more."+"\n");
}else if(Send.indexOf("?")!=-1){
jtaC.append("Robot:Please consider whether you can answer your own question."+"\n");
}
else{

jtaC.append("Robot: Sorry ,I can't understand what you say..."+ "\n");
}
}catch(Exception e){}
finally{
jtaA.setText(" ");
}
}
}
);
btnClear.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
jtaC.setText("  ");
}
}
);
btnExit.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
try{
System.exit(0);
}catch(Exception e){}
}
}
);
}
public static  void main(String args[]){
new  TalkBrower().CreateJFrame("Talk With Machine");
}
}