如何用某个词替换最后一个词文本区域?
how replace last word text area with some word?
我从 madprogrammer 那里得到了代码:
但我需要替换文本区域中的最后一个词,可能使用文档过滤或通过 space span(" ") between lastword 和 beforelastword。
有人可以帮我吗?我在google里搜索还是没找到
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.Utilities;
public class TheLastWord {
public static void main(String[] args) {
new TheLastWord();
}
public TheLastWord() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new BorderLayout());
JTextArea ta = new JTextArea(10, 20);
add(new JScrollPane(ta));
JLabel lastWord = new JLabel("...");
add(lastWord, BorderLayout.SOUTH);
ta.getDocument().addDocumentListener(new DocumentListener() {
@Override
public void insertUpdate(DocumentEvent e) {
checkLastWord();
}
@Override
public void removeUpdate(DocumentEvent e) {
checkLastWord();
}
@Override
public void changedUpdate(DocumentEvent e) {
checkLastWord();
}
protected void checkLastWord() {
try {
int start = Utilities.getWordStart(ta, ta.getCaretPosition());
int end = Utilities.getWordEnd(ta, ta.getCaretPosition());
String text = ta.getDocument().getText(start, end - start);
lastWord.setText(text);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
}
您可以使用像这样的正则表达式 (\w+.?)$
,它将匹配字符串的最后一个单词,即使它以 .
.
结尾
String sentence = "I am a full sentence";
String replaced = sentence.replaceAll("(\w+.?)$", "replaced");
System.out.println(replaced); // prints 'I am a full replaced'
你可以分裂。并获取最后一个索引,然后插入像这样的子字符串
String sentence ="Meow test test hello test.";
String[] temp = sentence.split("[|!|\?|.|\s|\n]");
String word = temp[temp.length-1];
int index = sentence.lastIndexOf(word);
String out = sentence.substring(0,index) + " INSERTED WORD" + sentence.substring(index+word.length(), sentence.length());
我从 madprogrammer 那里得到了代码:
但我需要替换文本区域中的最后一个词,可能使用文档过滤或通过 space span(" ") between lastword 和 beforelastword。
有人可以帮我吗?我在google里搜索还是没找到
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.Utilities;
public class TheLastWord {
public static void main(String[] args) {
new TheLastWord();
}
public TheLastWord() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
public TestPane() {
setLayout(new BorderLayout());
JTextArea ta = new JTextArea(10, 20);
add(new JScrollPane(ta));
JLabel lastWord = new JLabel("...");
add(lastWord, BorderLayout.SOUTH);
ta.getDocument().addDocumentListener(new DocumentListener() {
@Override
public void insertUpdate(DocumentEvent e) {
checkLastWord();
}
@Override
public void removeUpdate(DocumentEvent e) {
checkLastWord();
}
@Override
public void changedUpdate(DocumentEvent e) {
checkLastWord();
}
protected void checkLastWord() {
try {
int start = Utilities.getWordStart(ta, ta.getCaretPosition());
int end = Utilities.getWordEnd(ta, ta.getCaretPosition());
String text = ta.getDocument().getText(start, end - start);
lastWord.setText(text);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
}
}
您可以使用像这样的正则表达式 (\w+.?)$
,它将匹配字符串的最后一个单词,即使它以 .
.
String sentence = "I am a full sentence";
String replaced = sentence.replaceAll("(\w+.?)$", "replaced");
System.out.println(replaced); // prints 'I am a full replaced'
你可以分裂。并获取最后一个索引,然后插入像这样的子字符串
String sentence ="Meow test test hello test.";
String[] temp = sentence.split("[|!|\?|.|\s|\n]");
String word = temp[temp.length-1];
int index = sentence.lastIndexOf(word);
String out = sentence.substring(0,index) + " INSERTED WORD" + sentence.substring(index+word.length(), sentence.length());