Java ArrayList.contains() Method

public boolean contains(Object o)

The contains() method is used to determines whether an element exists in an ArrayList object. Returns true if this list contains the specified element.

Package: java.util

Java Platform: Java SE 8

Syntax:

contains(Object o)

Parameters:

Return Value:
true if this list contains the specified element

Return Value Type: boolean

Pictorial presentation of ArrayList.contains() Method

Example: ArrayList.contains Method

The following example checks whether a particular student is present in a list.

import java.util.*;

public class test {
  public static void main(String[] args) {
 
   // ArrayList with Capacity 4
      ArrayList<String> StudentList = new ArrayList<String>(4);
      //Added 4 elements
       StudentList.add("David");
       StudentList.add("Tom");
       StudentList.add("Rohit");
       StudentList.add("Paul");
      
       System.out.println("Students in the list are : ");
       System.out.println(StudentList);
  
       System.out.print("Is list contains the student Tom?");
       System.out.println(StudentList.contains("Tom"));
       System.out.print("Is list contains the student Sudhir?");
       System.out.println(StudentList.contains("Sudhir"));
   }
}

Output:

F:\java>javac test.java
F:\java>java test
Students in the list are :
[David, Tom, Rohit, Paul]
Is list contains the student Tom?true
Is list contains the student Sudhir?false

Java Code Editor:

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