testmsg.java

import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import java.awt.Dimension;
import javax.swing.JTextField;
import java.awt.Rectangle;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;

import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import java.io.*;
import java.awt.*;

public class testmsg extends JFrame {

 private static final long serialVersionUID = 1L;

 private JPanel jContentPane = null;

 private JTextField jTextField = null;

 private JLabel jLabel = null;

 private JButton jButton1 = null;

 private JScrollPane jScrollPane = null;

 private JTextArea jTextArea = null;

 private JButton jButton2 = null;

 /**
  * This is the default constructor
  */
 public testmsg() {
  super();
  initialize();
 }

 /**
  * This method initializes this
  *
  * @return void
  */
 private void initialize() {
  this.setSize(604, 324);
  this.setContentPane(getJContentPane());
  this.setTitle("JFrame");
 }

 /**
  * This method initializes jContentPane
  *
  * @return javax.swing.JPanel
  */
 private JPanel getJContentPane() {
  if (jContentPane == null) {
   jLabel = new JLabel();
   jLabel.setBounds(new Rectangle(9, 19, 42, 51));
   jLabel.setText("  路徑");
   jContentPane = new JPanel();
   jContentPane.setLayout(null);
   jContentPane.add(getJTextField(), null);
   jContentPane.add(jLabel, null);
   jContentPane.add(getJButton1(), null);
   jContentPane.add(getJScrollPane(), null);
   jContentPane.add(getJButton2(), null);
  }
  return jContentPane;
 }

 /**
  * This method initializes jTextField
  *
  * @return javax.swing.JTextField
  */
 private JTextField getJTextField() {
  if (jTextField == null) {
   jTextField = new JTextField();
   jTextField.setBounds(new Rectangle(63, 25, 330, 45));
  }
  return jTextField;
 }

 /**
  * This method initializes jButton1
  *
  * @return javax.swing.JButton
  */
 private JButton getJButton1() {
  if (jButton1 == null) {
   jButton1 = new JButton();
   jButton1.setBounds(new Rectangle(473, 20, 114, 48));
   jButton1.setText("讀入");
   jButton1.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent e) {

     String name = jTextField.getText();

     File ss = new File(name);
     try {
      FileReader a = new FileReader(ss);
      BufferedReader br = new BufferedReader(a);

      String s = br.readLine();
      String t=s;
      
      while(s!=null){
       s= br.readLine();
       t= t+"/n"+s;
       
      }
      t=t.substring(0,t.length()-4);
      jTextArea.setText(t);
      br.close();
      

     }

     catch (IOException e1) {

      JOptionPane.showMessageDialog(null, "檔案路徑錯誤，請重新輸入");

     }
    }
   });

  }
  return jButton1;
 }

 /**
  * This method initializes jScrollPane
  *
  * @return javax.swing.JScrollPane
  */
 private JScrollPane getJScrollPane() {
  if (jScrollPane == null) {
   jScrollPane = new JScrollPane();
   jScrollPane.setBounds(new Rectangle(10, 103, 444, 174));
   jScrollPane.setViewportView(getJTextArea());
  }
  return jScrollPane;
 }

 /**
  * This method initializes jTextArea
  *
  * @return javax.swing.JTextArea
  */
 private JTextArea getJTextArea() {
  if (jTextArea == null) {
   jTextArea = new JTextArea();
   jTextArea.setText("");
  }
  return jTextArea;
 }

 /**
  * This method initializes jButton2
  *
  * @return javax.swing.JButton
  */
 private JButton getJButton2() {
  if (jButton2 == null) {
   jButton2 = new JButton();
   jButton2.setBounds(new Rectangle(480, 215, 110, 55));
   jButton2.setText("儲存");
   jButton2.addActionListener(new java.awt.event.ActionListener() {
    public void actionPerformed(java.awt.event.ActionEvent e) {
     String name = jTextField.getText();
     String s = null;
     s=jTextArea.getText();//把所有的值都賦給了s 所以下面不用判斷while了 輸出直接全部輸出了
     File file = new File(name);
     try {
       
      

      PrintWriter br = new PrintWriter(new FileWriter(file));
      String nam = jTextField.getText();
      
     

       br.println(s);
       //s=jTextArea.getText();
      

       
 
 
      
      br.close();
      
     } catch (IOException e2) {

      JOptionPane.showMessageDialog(null, "檔案路徑錯誤,請檢查路徑");
     }

    }
   });
  }
  return jButton2;
 }
}