public class b4 {
    public static void main(String[] args) {
	oef8a();
	oef8d1();
	oef8d2();
	m();
    }

    static void oef8a() {
	double[] rijB = new double[5];
	for (int i = 0; i != rijB.length; i++) { rijB[i] = i; }
	double res = 0;
	for (int i = 0; i != rijB.length; i++) { 
	    res = res + rijB[i];
	}
	res = res / rijB.length;
    }


    static void oef8d1() {
	int[] rijE = {1, 2, 3, 4, 5};
	int[] rijF = {6, 7, 8, 9, 10};
	rijE = rijF;
	rijE[0]++;
    }


    static void oef8d2() {
	int[] rijE = {1, 2, 3, 4, 5};
	int[] rijF = {6, 7, 8, 9, 10};
	for (int i = 0; i != rijE.length; i++) { 
	    rijE[i] = rijF[i];
	}
	rijE[0]++;
    }

    static void m() {
	int[][] m = new int[4][];
	for (int i = 0; i < 4; i++) {
		if (i < 2)
			m[i] = new int[5];
		else
			m[i] = m[i-1];
		for (int j = 0; j < 5; j++) {
			m[i][j] += i * j;
		}
	}
    }
}