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Java 1 - Arrays

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  1. import java.util.Arrays;
  2.  
  3. public class A {
  4. 	public void bubblesort(double[] x) {
  5. 		for (int i = 0; i < x.length; i++) {
  6. 			for (int j = x.length - 1; j > 0; j--) {
  7. 				if (x[j - 1] > x[j]) {
  8. 					double tmp = x[j - 1];
  9. 					x[j - 1] = x[j];
  10. 					x[j] = tmp;
  11. 				}
  12. 			}
  13. 		}
  14. 	}
  15.  
  16. 	public void decreasingInsertionSort(double[] x) {
  17. 		for (int i = 1; i < x.length; i++) {
  18. 			double max = x[i];
  19. 			int j = i;
  20. 			while (j > 0 && x[j - 1] < max) { // change x[j - 1] > max to x[j - 1] < max
  21. 				x[j] = x[j - 1];
  22. 				j--;
  23. 			}
  24. 			x[j] = max;
  25. 		}
  26. 	}
  27.  
  28. 	public void employees() {
  29. 		int[][] employees = {{0, 2, 4, 3, 4, 5, 8, 8},
  30. 							{1, 7, 3, 4, 3, 3, 4, 4},
  31. 							{2, 3, 3, 4, 3, 3, 2, 2},
  32. 							{3, 9, 3, 4, 7, 3, 4, 1},
  33. 							{4, 3, 5, 4, 3, 6, 3, 8},
  34. 							{5, 3, 4, 4, 6, 3, 4, 4},
  35. 							{6, 3, 7, 4, 8, 3, 8, 4},
  36. 							{7, 6, 3, 5, 9, 2, 7, 9}};
  37. 		int[] sum = new int[8];
  38. 		for (int i = 0; i < employees.length; i++) {
  39. 			int no = employees[i][0];
  40. 			for (int j = 1; j < employees[i].length; j++) {
  41. 				sum[no] += employees[i][j];
  42. 			}
  43. 		}
  44. 		System.out.println(printEmployees(employees, sum));
  45. 		for (int i = 0; i < employees.length; i++) {
  46. 			for (int j = employees.length - 1; j > 0; j--) {
  47. 				if (sum[employees[j - 1][0]] < sum[employees[j][0]]) {
  48. 					int[] tmp = employees[j - 1];
  49. 					employees[j - 1] = employees[j];
  50. 					employees[j] = tmp;
  51. 				}
  52. 			}
  53. 		}
  54. 		System.out.println(printEmployees(employees, sum));
  55. 	}
  56.  
  57. 	public String printEmployees(int[][] employees, int[] sum) {
  58. 		String str = "\n        \tSu M  T  W  H  F  Sa Sum\n\n";
  59. 		for (int i = 0; i < employees.length; i++) {
  60. 			str += "Employee " + employees[i][0] + "\t";
  61. 			for (int j = 1; j < employees[i].length; j++) {
  62. 				str += employees[i][j] + "  ";
  63. 			}
  64. 			str += sum[employees[i][0]] + "\n";
  65. 		}
  66. 		return str;
  67. 	}
  68.  
  69. 	public static void main(String []args) {
  70. 		// 6.18
  71. 		A a = new A();
  72. 		double[] x = {6.0, 4.4, 1.9, 2.9, 3.4, 2.9, 3.5};
  73. 		System.out.println(Arrays.toString(x));
  74. 		a.bubblesort(x);
  75. 		System.out.println(Arrays.toString(x));
  76. 		// 6.19
  77. 		double[] y = {6.0, 4.4, 1.9, 2.9, 3.4, 2.9, 3.5};
  78. 		System.out.println(Arrays.toString(y));
  79. 		a.decreasingInsertionSort(y);
  80. 		System.out.println(Arrays.toString(y));
  81. 		// 6.23
  82. 		a.employees();
  83. 	}
  84. }

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