list java get index code example

Example 1: java array get index

public int getArrayIndex(int[] arr,int value) {

        int k=0;
        for(int i=0;i<arr.length;i++){

            if(arr[i]==value){
                k=i;
                break;
            }
        }
    return k;
}

Example 2: java first index of an arraylist

ArrayList<Type> array = new ArrayList<Type>();
System.out.printLn(array[0]);