ActionListener为JTextArea中的特定文本? [英] ActionListener for a specific text inside a JTextArea?
本文介绍了ActionListener为JTextArea中的特定文本?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
JTextArea
。 现在,如何为特定文本添加一个类似ActionListener的事件(如student:// xxxx)?
所以当我点击那个文本(学生:// xxxx)会发生什么事情。
谢谢。
解决方案
这里尝试这个小程序,尝试点击学生的开始://,这将弹出一个消息对话框
import java.awt。*;
import java.awt.event。*;
import javax.swing。*;
public class TextAreaExample extends JFrame
{
private JTextArea tarea = new JTextArea(10,10);
private JTextField tfield = new JTextField(10);
private void createAndDisplayGUI()
{
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
tarea.setText(Hello there\\\
);
tarea.append(Hello student://);
JScrollPane scroll = new JScrollPane(tarea);
tfield.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
tarea.append(tfield.getText() +\\\
);
}
});
tarea.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent me)
{
int x = me.getX();
int y = me.getY();
System.out.println(X:+ x);
System.out.println(Y:+ y);
int startOffset = tarea.viewToModel(new Point(x,y));
System.out.println(Start Offset:+ startOffset);
String text = tarea.getText() ;
int searchLocation = text.indexOf(student://,startOffset);
System.out.println(Search Location:+ searchLocation);
if(searchLocation == startOffset)
JOptionPane.showMessageDialog(TextAreaExample.this,BINGO你找到我);
}
});
getContentPane()。add(scroll,BorderLayout.CENTER);
getContentPane()。add(tfield,BorderLayout.PAGE_END);
pack();
setLocationByPlatform(true);
setVisible(true);
}
public static void main(String ... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new TextAreaExample()。createAndDisplayGUI();
}
});
}
}
I have in my app a chat component which has a JTextArea
on it.
Now, how can I add an ActionListener-like event for a specific text (like student://xxxx)?
So when I click on that text (student://xxxx) something will happen. Thank you.
解决方案
Here try this small program, try to click at the start of student://, that will pop up a message Dialog
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TextAreaExample extends JFrame
{
private JTextArea tarea = new JTextArea(10, 10);
private JTextField tfield = new JTextField(10);
private void createAndDisplayGUI()
{
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
tarea.setText("Hello there\n");
tarea.append("Hello student://");
JScrollPane scroll = new JScrollPane(tarea);
tfield.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
tarea.append(tfield.getText() + "\n");
}
});
tarea.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent me)
{
int x = me.getX();
int y = me.getY();
System.out.println("X : " + x);
System.out.println("Y : " + y);
int startOffset = tarea.viewToModel(new Point(x, y));
System.out.println("Start Offset : " + startOffset);
String text = tarea.getText();
int searchLocation = text.indexOf("student://", startOffset);
System.out.println("Search Location : " + searchLocation);
if (searchLocation == startOffset)
JOptionPane.showMessageDialog(TextAreaExample.this, "BINGO you found me.");
}
});
getContentPane().add(scroll, BorderLayout.CENTER);
getContentPane().add(tfield, BorderLayout.PAGE_END);
pack();
setLocationByPlatform(true);
setVisible(true);
}
public static void main(String... args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new TextAreaExample().createAndDisplayGUI();
}
});
}
}
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