how to check an arraylist contains a value in java

arraylist.contains() mehtod use for check java arraylist contains element or not . arraylist contains() Method returns true if this list contains the given element. means , returns true if and only if this list contains at least one element e such that (o==null ? e==null : o.equals(e)).

Systax :

public boolean contains(Object o) {

}
  • Parameters:
    o element whose presence in this list is to be teste
  • Returns Value :
    true if this list contains the specified element

Java ArrayList contains() Method example

import java.util.ArrayList;

public class ContailsElement {

public static void main(String[] args) {

ArrayList<String> arr = new ArrayList<String>();
// add element in arraylist
arr.add("c");
arr.add("php");
arr.add("html");
arr.add("java");
// print arraylist
System.out.println("arrayList is = " + arr);
/*
* Returns true if this list contains the specified element
*/
System.out.println(arr.contains("php"));

System.out.println(arr.contains("more"));
}

}

Output:

arrayList is = [c, php, html, java]

true

false

Java Arraylist Guide 

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