ContainMethod

import java.util.ArrayList;

public class ContainMethod {

public static void main(String[] args)
{
ArrayList<String> ar1 = new ArrayList<>();
ar1.add("1");
ar1.add("2");
ar1.add("3");
ar1.add("4");

if(ar1.contains("2"))
{
System.out.print("Yes, This is available");
}else
{
System.out.print("No, This isn't available");
}
}
}