I created a window with a button and 3 fields, 1st, 2nd field is the text, and in the 3rd field, it is necessary to write down words that are repeated in 1st & 2nd fields. How to make it?

 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){
                
            }
        });

CodePudding user response：

Tell me that the below code does what you want and I will add explanations.

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());
    }
}

This is what it looks like when I run it (before clicking on the button).

CodePudding user response：

You have to split both textarea word and check if first textarea word is matched with second textarea word, If match print it in third textarea.

Here down is example:

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();//Apple Mango Orange;
                String str2 = TextArea2.getText();//Mango Orange Banana;
                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);
    }
}

Output: