import java.util.Scanner;
public class Test {
	static void vi(int array[], int request){
		boolean found = false;
		for(int j=0;j<array.length;j++){
			if(array[j]==request){
				array[j] = 0; found = true;
				System.out.println("Is OK");
			}
		}
		if(!found){
			System.err.println("Not Found: "+request);
		}
	}
	public static final int MAX = 4;
	public static void main(String[] args) {
		final Scanner scanner = new Scanner(System.in);
		int []array = new int[MAX];
		for(int index=0;index<array.length;index++){
			System.out.print("Element Nro["+index+"]"+": ");
			array[index] = scanner.nextInt();
		}
		System.out.println("-------------------------------");
		System.out.print("Remove value: ");
		int request = scanner.nextInt();
		vi(array,request);		
	}
}

Element Nro[0]: 30
Element Nro[1]: 2
Element Nro[2]: 3
Element Nro[3]: 10
-------------------------------
Remove value: 10
Is OK