i need to find a integer data in arraylist?

Question

I have an Arraylist. If user enter the same number secondly I want to show to user. For this I need to find Arraylist have it or not.

I hop

Answer 1

If I understand your question, you want to check if an array list already contains and integer value. If so, you could use ArrayList.contains().

Sample code here:

ArrayList list = new ArrayList();
int x = 4, y = 7;
int z = x;

list.add(x);

//List contains the value 4, which is the value stored in z
//Program will output "List contains 4"
if(list.contains(z))
{
    System.out.printf("List contains %d\n", z);
}
else
{
    System.out.printf("List does not contain %d\n", z);
}

//List contains the value 7, which is the value stored in y
//Program will output "List does not contain 7"   
if(list.contains(y))
{
    System.out.printf("List contains %d\n", y);
}
else
{
    System.out.printf("List does not contain %d\n", y);
}