Javaは、2つのtxt形式のテキストの内容を比較します

テキストデータ

txt1.txt

1
2
4
41
12

txt2.txt

1
2
3
4
56
234
41
12

要件：txt2.txtには値がありますが、txt1.txtにはありません

コードは次のように表示されます。

package text;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class Text {
    
    
    public static void main(String[] args) {
    
    
        Text text = new Text();
        text.read();
    }

    public void read() {
    
    
        String s;
        BufferedReader bufferedReader1 = null;
        BufferedReader bufferedReader2 = null;
        try {
    
    
            bufferedReader1 = new BufferedReader(new InputStreamReader(new FileInputStream(this.getClass().getResource("txt1.txt").getPath())));
            bufferedReader2 = new BufferedReader(new InputStreamReader(new FileInputStream(this.getClass().getResource("txt2.txt").getPath())));
            ArrayList<String> arrayList1 = new ArrayList<>();
            ArrayList<String> arrayList2 = new ArrayList<>();
            while ((s = bufferedReader1.readLine()) != null) {
    
    
                arrayList1.add(s);
            }
            while ((s = bufferedReader2.readLine()) != null) {
    
    
                arrayList2.add(s);
            }
            List<String> collect = arrayList2.stream().filter(s1 -> !arrayList1.contains(s1)).collect(Collectors.toList());
            System.out.println(collect);
        } catch (IOException e) {
    
    
            e.printStackTrace();
        } finally {
    
    
            // 释放资源
            if (bufferedReader1 != null) {
    
    
                try {
    
    
                    bufferedReader1.close();
                } catch (IOException e) {
    
    
                    e.printStackTrace();
                }
            }
            if (bufferedReader2 != null) {
    
    
                try {
    
    
                    bufferedReader2.close();
                } catch (IOException e) {
    
    
                    e.printStackTrace();
                }
            }
        }
    }
}

効果