How to determine whether a string exists in a list collection in java

You can use the containment method contains. If it exists, it returns true. If it does not exist, it returns false.

Code examples are as follows: (Related learning video tutorial sharing: java video tutorial)

package com.jianhu.Test;
 
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
 
public class Test01 {
 
	public static void main(String[] args) {
		
            List list = new ArrayList();
            list.add("12");
            list.add("35");
            list.add("46");
            boolean bool = list.contains("12");
            boolean bool2 = list.contains("41");
            System.out.println(bool);//true
            System.out.println(bool2);//false
	}
 
}

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