我創建了一個帶有按鈕和 3 個欄位的視窗，第一個、第二個欄位是文本，在第三個欄位中，需要寫下在第一個和第二個欄位中重復的單詞。怎么做？
JFrame frame = new JFrame("new Frame");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Label lbTextLabel = new Label("1:");
lbTextLabel.setBounds(50, 10, 120, 20);
Label lbTextLabel2 = new Label("2:");
lbTextLabel2.setBounds(50, 50, 120, 20);
Label lbTextLabel3 = new Label("3:");
lbTextLabel3.setBounds(50, 90, 120, 20);
JTextArea TextArea = new JTextArea("Welcome to javatpoint");
TextArea.setBounds(50,30, 120,20);
JTextArea TextArea2 = new JTextArea("Welcome to javatpoint 2");
TextArea2.setBounds(50,70, 127,20);
JTextArea TextArea3 = new JTextArea("");
TextArea3.setBounds(50,110, 127,20);
JButton button =new JButton("Click Here");
button.setBounds(140,130,95,30);
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
}
});
uj5u.com熱心網友回復：
您必須拆分兩個 textarea 單詞并檢查第一個 textarea 單詞是否與第二個 textarea 單詞匹配，如果匹配則將其列印在第三個 textarea 中。
下面是例子：
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
class CompareWord{
public static void main(String[] args) {
JFrame f;
JLabel lbTextLabelt1, lbTextLabel2, lbTextLabel3;
JTextArea TextArea, TextArea2, TextArea3;
JButton button;
f = new JFrame("new Frame");
lbTextLabelt1 = new JLabel("1:");
lbTextLabelt1.setBounds(50, 10, 120, 20);
lbTextLabel2 = new JLabel("2:");
lbTextLabel2.setBounds(50, 70, 120, 20);
lbTextLabel3 = new JLabel("3:");
lbTextLabel3.setBounds(50, 140, 120, 20);
TextArea = new JTextArea("Welcome to javatpoint");
TextArea.setBounds(50,30, 120,30);
TextArea2 = new JTextArea("Welcome to javatpoint");
TextArea2.setBounds(50,90, 127,30);
TextArea3 = new JTextArea("");
TextArea3.setBounds(50,160, 127,30);
button = new JButton("Click Here");
button.setBounds(120,200,95,30);
button.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String str1 = TextArea.getText(); // ?? ?? ??;
String str2 = TextArea2.getText(); // ?? ?? ??
String str3 = "";
String arrStr1[] = str1.split("//s ");
String arrStr2[] = str2.split("//s ");
List<String> wordsOfFirstStr = Arrays.asList(str1.split(" "));
for (String wordsOfSecondStr : str2.split(" ")) {
if(wordsOfFirstStr.contains(wordsOfSecondStr))
{
str3 = wordsOfSecondStr " ";
}
}
TextArea3.setText(str3);
}
});
f.add(lbTextLabelt1);
f.add(lbTextLabel2);
f.add(lbTextLabel3);
f.add(TextArea);
f.add(TextArea2);
f.add(TextArea3);
f.add(button);
f.setSize(400, 400);
f.setLayout(null);
f.setVisible(true);
}
}
輸出：
uj5u.com熱心網友回復：
告訴我下面的代碼可以滿足您的需求，我將添加解釋。
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
public class Identify {
private JTextArea oneTextArea;
private JTextArea twoTextArea;
private JTextArea threeTextArea;
private void createAndDisplayGui() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createMainPanel(), BorderLayout.CENTER);
frame.add(createButtonsPanel(), BorderLayout.PAGE_END);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private JPanel createButtonsPanel() {
JPanel buttonsPanel = new JPanel();
JButton button = new JButton("Click Me");
button.setMnemonic(KeyEvent.VK_C);
button.addActionListener(this::findCommonWords);
buttonsPanel.add(button);
return buttonsPanel;
}
private JPanel createMainPanel() {
JPanel mainPanel = new JPanel(new GridLayout(0, 2, 10, 10));
mainPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
JLabel oneLabel = new JLabel(" 1:");
oneLabel.setDisplayedMnemonic(KeyEvent.VK_1);
mainPanel.add(oneLabel);
oneTextArea = new JTextArea("Apple Mango Orange");
mainPanel.add(oneTextArea);
oneLabel.setLabelFor(oneTextArea);
JLabel twoLabel = new JLabel(" 2:");
twoLabel.setDisplayedMnemonic(KeyEvent.VK_2);
mainPanel.add(twoLabel);
twoTextArea = new JTextArea("Mango Orange Banana");
mainPanel.add(twoTextArea);
twoLabel.setLabelFor(twoTextArea);
JLabel threeLabel = new JLabel(" 3:");
threeLabel.setDisplayedMnemonic(KeyEvent.VK_3);
mainPanel.add(threeLabel);
threeTextArea = new JTextArea(1, 10);
mainPanel.add(threeTextArea);
threeLabel.setLabelFor(threeTextArea);
return mainPanel;
}
private void findCommonWords(ActionEvent event) {
String text1 = oneTextArea.getText();
String text2 = twoTextArea.getText();
String[] words1 = text1.split(" ");
String[] words2 = text2.split(" ");
List<String> list1;
List<String> list2;
if (words1.length > words2.length) {
list1 = new ArrayList<>(Arrays.asList(words1));
list2 = new ArrayList<>(Arrays.asList(words2));
}
else {
list1 = new ArrayList<>(Arrays.asList(words2));
list2 = new ArrayList<>(Arrays.asList(words1));
}
list1.retainAll(list2);
threeTextArea.setText(list1.stream().collect(Collectors.joining(" ")));
}
public static void main(String[] args) {
EventQueue.invokeLater(() -> new Identify().createAndDisplayGui());
}
}
這是我運行它時的樣子（在單擊按鈕之前）。
轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/434903.html