import java.util.Arrays;

public class A {
	public void bubblesort(double[] x) {
		for (int i = 0; i < x.length; i++) {
			for (int j = x.length - 1; j > 0; j--) {
				if (x[j - 1] > x[j]) {
					double tmp = x[j - 1];
					x[j - 1] = x[j];
					x[j] = tmp;
				}
			}
		}
	}
	
	public void decreasingInsertionSort(double[] x) {
		for (int i = 1; i < x.length; i++) {
			double max = x[i];
			int j = i;
			while (j > 0 && x[j - 1] < max) { // change x[j - 1] > max to x[j - 1] < max
				x[j] = x[j - 1];
				j--;
			}
			x[j] = max;
		}
	}
	
	public void employees() {
		int[][] employees = {{0, 2, 4, 3, 4, 5, 8, 8},
							{1, 7, 3, 4, 3, 3, 4, 4},
							{2, 3, 3, 4, 3, 3, 2, 2},
							{3, 9, 3, 4, 7, 3, 4, 1},
							{4, 3, 5, 4, 3, 6, 3, 8},
							{5, 3, 4, 4, 6, 3, 4, 4},
							{6, 3, 7, 4, 8, 3, 8, 4},
							{7, 6, 3, 5, 9, 2, 7, 9}};
		int[] sum = new int[8];
		for (int i = 0; i < employees.length; i++) {
			int no = employees[i][0];
			for (int j = 1; j < employees[i].length; j++) {
				sum[no] += employees[i][j];
			}
		}
		System.out.println(printEmployees(employees, sum));
		for (int i = 0; i < employees.length; i++) {
			for (int j = employees.length - 1; j > 0; j--) {
				if (sum[employees[j - 1][0]] < sum[employees[j][0]]) {
					int[] tmp = employees[j - 1];
					employees[j - 1] = employees[j];
					employees[j] = tmp;
				}
			}
		}
		System.out.println(printEmployees(employees, sum));
	}
	
	public String printEmployees(int[][] employees, int[] sum) {
		String str = "\n        \tSu M  T  W  H  F  Sa Sum\n\n";
		for (int i = 0; i < employees.length; i++) {
			str += "Employee " + employees[i][0] + "\t";
			for (int j = 1; j < employees[i].length; j++) {
				str += employees[i][j] + "  ";
			}
			str += sum[employees[i][0]] + "\n";
		}
		return str;
	}
	
	public static void main(String []args) {
		// 6.18
		A a = new A();
		double[] x = {6.0, 4.4, 1.9, 2.9, 3.4, 2.9, 3.5};
		System.out.println(Arrays.toString(x));
		a.bubblesort(x);
		System.out.println(Arrays.toString(x));
		// 6.19
		double[] y = {6.0, 4.4, 1.9, 2.9, 3.4, 2.9, 3.5};
		System.out.println(Arrays.toString(y));
		a.decreasingInsertionSort(y);
		System.out.println(Arrays.toString(y));
		// 6.23
		a.employees();
	}
}

Java 1 - Arrays

Java