将文本文件加载到文本区域 [英] Loading a text file into a textarea
本文介绍了将文本文件加载到文本区域的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
首先,我对Java非常基础.我正在尝试浏览 .txt 文件并将其内容加载到文本区域中.我完成了部分,直到我收到JFileChooser的文件,现在我不知道如何做剩下的.
<预><代码>...File selFile = new File(fileChooser.getSelectedfile());///从这里我想将其内容加载到文本区域txtArea" 解决方案
使用所有 Swing 文本组件都支持的 read(...) 和 write(...) 方法.简单例子:
import java.awt.*;导入 java.awt.event.*;导入 java.io.*;导入 javax.swing.*;导入 javax.swing.text.*;类 TextAreaLoad{public static void main(String a[]){最终 JTextArea 编辑 = 新 JTextArea(10, 60);edit.setText(一
二
三");edit.append(
四
五");JButton read = new JButton("Read TextAreaLoad.txt");read.addActionListener(new ActionListener(){public void actionPerformed(ActionEvent e){尝试{FileReader reader = new FileReader( "TextAreaLoad.txt");BufferedReader br = new BufferedReader(reader);edit.read( br, null );br.close();edit.requestFocus();}catch(Exception e2) { System.out.println(e2);}}});JButton write = new JButton("Write TextAreaLoad.txt");write.addActionListener( new ActionListener(){public void actionPerformed(ActionEvent e){尝试{FileWriter writer = new FileWriter( "TextAreaLoad.txt");BufferedWriter bw = new BufferedWriter( writer );编辑.写(体重);bw.close();edit.setText("");edit.requestFocus();}捕获(异常 e2){}}});JFrame frame = new JFrame(TextArea Load");frame.getContentPane().add(new JScrollPane(edit), BorderLayout.NORTH);frame.getContentPane().add(read, BorderLayout.WEST);frame.getContentPane().add(write, BorderLayout.EAST);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);框架.pack();frame.setLocationRelativeTo( null );frame.setVisible(true);}}
First of all, I am very basic at java. I am trying to browse a .txt file and load the contents of it, into the text area. I am completed the part, till which I receive the file from the JFileChooser, now I dont know how to do the remaining.
.
.
.
File selFile = new File(fileChooser.getSelectedfile());
/// From here I want to load its content to a textarea "txtArea"
解决方案
Use the read(...) and write(...) methods that are suppoorted by all Swing text components. Simple example:
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import javax.swing.text.*;
class TextAreaLoad
{
public static void main(String a[])
{
final JTextArea edit = new JTextArea(10, 60);
edit.setText("one
two
three");
edit.append("
four
five");
JButton read = new JButton("Read TextAreaLoad.txt");
read.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
FileReader reader = new FileReader( "TextAreaLoad.txt" );
BufferedReader br = new BufferedReader(reader);
edit.read( br, null );
br.close();
edit.requestFocus();
}
catch(Exception e2) { System.out.println(e2); }
}
});
JButton write = new JButton("Write TextAreaLoad.txt");
write.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
try
{
FileWriter writer = new FileWriter( "TextAreaLoad.txt" );
BufferedWriter bw = new BufferedWriter( writer );
edit.write( bw );
bw.close();
edit.setText("");
edit.requestFocus();
}
catch(Exception e2) {}
}
});
JFrame frame = new JFrame("TextArea Load");
frame.getContentPane().add( new JScrollPane(edit), BorderLayout.NORTH );
frame.getContentPane().add(read, BorderLayout.WEST);
frame.getContentPane().add(write, BorderLayout.EAST);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo( null );
frame.setVisible(true);
}
}
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