java中 textArea这个类设计的界面不能编辑

[站在巨人的肩膀上奋斗]

我用java中的这个类textArea,设计了一个界面,但这个文本区域不能编辑,只能复制、粘贴、打印中文,英文不能打印,也不能删除，请问这是怎么回事?

[feifeikub]

具体情况具体分析，给段代码出来。

[write2me]

TextArea ta=......;

ta.setEditable(false);

[站在巨人的肩膀上奋斗]

这是全部的代码

package cn.itcast.day_20;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class GuiChat {
private Frame frame = new Frame("GUI聊天室"); //需要的成员变量
private Panel centerPanel = new Panel();
private Panel southPanel = new Panel();
private TextArea centerTextArea = new TextArea();
private TextArea southTextArea = new TextArea(5, 1); //5行1列,但会铺满边界
private TextField textField = new TextField(20);
private Button sendButton = new Button("发送");
private Button clearButton = new Button("清空");
private Button logButton = new Button("聊天记录");
private Button shakeButton = new Button("震屏");

private DatagramSocket socket;
private Lock lock = new ReentrantLock();
private Writer writer;

public GuiChat(){ //事件方法
inti();
generateGUI();
handleEvent();
new newThread().start();
}

private void inti() { //抛异常对象
try {
socket = new DatagramSocket();
writer = new BufferedWriter(new FileWriter("log.txt", true));
} catch (IOException e) {

throw new RuntimeException();
}

}

private void handleEvent() {
//窗口监听器
frame.addWindowListener(new WindowAdapter(){

@Override
public void windowClosing(WindowEvent e) {

try {
writer.close();
socket.close();

System.exit(0);
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}

});
//发送按钮监听器
sendButton.addMouseListener(new MouseAdapter(){

@Override
public void mousePressed(MouseEvent e) {
send();
}

});

//南边区域监听器
southTextArea.addKeyListener(new KeyAdapter(){

@Override
public void keyPressed(KeyEvent e)
if(e.getKeyCode() == KeyEvent.VK_ENTER && e.isControlDown()){
send();
e.consume(); // 把指针定位在第一行

}

});

//清空监听器
clearButton.addMouseListener(new MouseAdapter(){

@Override
public void mousePressed(MouseEvent e) {
centerTextArea.setText("");
}

});

//日志监听器
logButton.addMouseListener(new MouseAdapter(){

@Override
public void mousePressed(MouseEvent e) {
showLog();
}

});

//震动监听器
shakeButton.addMouseListener(new MouseAdapter(){

@Override
public void mousePressed(MouseEvent e) {
sendShake();
}

});
}

//设计震屏,但震屏不能出现在发送的内容中,这就选一个特殊的数字代替
private void sendShake() {
sendDate(textField.getText(), new byte[]{-1});

}

//聊天记录方法
private void showLog(){

try {
writer.flush();
FileInputStream fis = new FileInputStream("log.txt");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len;
while ((len = fis.read(buffer)) != -1) {
baos.write(buffer, 0, len);
}
fis.close();
baos.close();

String content = new String(baos.toByteArray());
centerTextArea.setText(content);
} catch (Exception e) {
// TODO: handle exception
}


}

//发送消息方法
private void send() {
String message = southTextArea.getText();
String ip = textField.getText();
ip = "".equals(ip) ? "255.255.255.255" : ip;

if(message.length() == 0)
return;

String regexPart = "((\\d)|(\\d{2})|([01]\\d{2})|(2[0-4]\\d)|(25[0-5]))";
String isRegex = regexPart + "\\." + regexPart + "\\." + regexPart + "\\." +regexPart;
if(!ip.matches(isRegex))
return;

lock.lock();
try {
sendDate(ip, message.getBytes()); //定义一个发送数据的方法
//这里有可能会出错误,当数据还没有打印出来,而接收到的数据就显示出来了,就要使用同步

String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());
String content = time + " 我对 " + ip + " 说: " + "\r\n" + message + "\r\n\r\n";
centerTextArea.append(content);
writer.write(content);
southTextArea.setText("");
} catch (Exception e) {
throw new RuntimeException();
}finally{
lock.unlock();
}
}

//发送消息数据方法
private void sendDate(String ip, byte[] bytes){

try {
DatagramPacket packet = new DatagramPacket(bytes, bytes.length, InetAddress.getByName(ip), 9999);
socket.send(packet);
} catch (IOException e) {

throw new RuntimeException(e);
}

}

//创建新的线程用来接收消息
class newThread extends Thread{

@Override
public void run() {
try {
// 使用UDP协议接收数据
DatagramSocket socket = new DatagramSocket(9999);
DatagramPacket packet = new DatagramPacket(new byte[1024 * (1024)], 1024 * 1024);
while (true) {
socket.receive(packet);

if(packet.getLength() == 1 && packet.getData()[0] == -1){
doShake();
continue;
}
String ip = packet.getAddress().getHostName(); //???
String message = new String(packet.getData(), 0, packet.getLength());
String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());

String content = time + ip + " 对我说: " + "\r\n" + message + "\r\n\r\n";
lock.lock();
try{

centerTextArea.append(content); //显示在centerTextArea上
writer.write(content);
}finally{
lock.unlock();
}
}
} catch (Exception e) {
e.getStackTrace();
}

}
}

//震屏方法
public void doShake() {
int x = frame.getLocation().x;
int y = frame.getLocation().y;
// frame.toFront(); // 有可能无效
// frame.setVisible(true);

try {
frame.setLocation(x - 20, y - 20);
Thread.sleep(20);
frame.setLocation(x + 20, y - 0);
Thread.sleep(20);
frame.setLocation(x + 20, y + 20);
Thread.sleep(20);
frame.setLocation(x - 20, y + 20);
frame.setLocation(x - 20, y - 20);
Thread.sleep(20);
frame.setLocation(x + 20, y - 0);
Thread.sleep(20);
frame.setLocation(x + 20, y + 20);
Thread.sleep(20);
frame.setLocation(x - 20, y + 20);
Thread.sleep(20);

frame.setLocation(x, y);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

//图形界面方法
private void generateGUI() {
//设置frame
frame.setSize(400, 600);
frame.setLocation(450,50);
frame.setResizable(false);

//设计中间的Panel
frame.add(centerPanel, BorderLayout.CENTER);
centerPanel.setLayout(new BorderLayout());
centerPanel.add(centerTextArea,BorderLayout.CENTER);
centerPanel.add(southTextArea, BorderLayout.SOUTH);

southTextArea.setEditable(true);
centerTextArea.setEditable(false);
centerTextArea.setBackground(Color.WHITE);

//设计南边的Panel
frame.add(southPanel, BorderLayout.SOUTH);
southPanel.add(textField);
southPanel.add(sendButton);
southPanel.add(clearButton);
southPanel.add(logButton);
southPanel.add(shakeButton);

textField.setText("192.168.1.126");

frame.setVisible(true);
}


//创建对象,自动调用构造函数
public static void main(String[] args) {
new GuiChat();
}

}

[vaecsd_n]

southTextArea.setEditable(true); centerTextArea.setEditable(false); centerTextArea.setBackground(Color.WHITE); 其中的“centerTextArea.setEditable(false);”中的“false”改“true”！