这里我附加了代码片段，该代码片段应该选择文件并逐行读取该文件，并将该数据添加到JTextArea。
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
File selectedFile;
FileReader reader = null;
BufferedReader in;
String inputLine = "";
double port1 = Math.random();
long portNo = Math.round(Math.random() * 10000);
System.out.println("portNo"+portNo);
int LineNumber = 0;
try {
final JFileChooser fc = new JFileChooser();
DataInputStream inp=null;
ServerSocket ss=new ServerSocket((int) portNo);
Socket socket=new Socket("localhost",(int) portNo);
Socket socket1=ss.accept();
fc.setFileSelectionMode(JFileChooser.FILES_ONLY);
txtSearch.setText((fc.showOpenDialog(CreateNode.this) == JFileChooser.APPROVE_OPTION) ? fc.getSelectedFile().toString() : txtSearch.getText());
if (fc.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
//gets file from dialog
selectedFile = fc.getSelectedFile();
//makes sure files can be processed before proceeding
if (selectedFile.canRead() && selectedFile.exists()) {
//System.out.println("can read:"+selectedFile.canRead()+"exists:"+selectedFile.exists());
reader = new FileReader(selectedFile);
}
in = new BufferedReader(reader);
//inputLine recieves file text
DataOutputStream dos4=new DataOutputStream(socket.getOutputStream());
while ((inputLine=in.readLine())!=null ) {
//LineNumber isn't needed, but it adds a line count on the left, nice
// inputLine=in.readLine();
System.out.println("inputline"+inputLine+"LineNumber:"+LineNumber);
LineNumber++;
fileData.append(LineNumber + ": " + inputLine + "\n");
//next line in File opened
dos4.writeUTF(LineNumber + ": " + inputLine + "\n");
}
dos4.close();
inp=new DataInputStream(socket1.getInputStream());
String input = (String)inp.readUTF();
//close stream, files stops loading
in.close();
}
catch (Exception e) {
System.out.println("Exception e:"+e);
e.printStackTrace();
}
}
这里没有显示任何错误，并且在控制台(sysout)中显示数据，但没有附加到文本区域。
最佳答案
不@mahender Reddy yasa 它没有连接到套接字服务器，只需检查是否遵循这些步骤
1)启动服务器
2)尝试连接客户端与服务器
关于java - JTextArea数据附加不显示错误但加载文件时不显示数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/28556712/