java 对二维数组排序的几种方法_java 二维数组排序

public void dAM1() {
		int[] a[] = {
				{ 12, 26, 89, 78, 45, 65, 36 }, 
				{ 2, 6, 90, 34, 16, 27, 5 },
				{ 13, 3, 4, 29, 33, 37, 17 },
				{ 1, 9, 19, 49, 57, 22, 11 },
				{ 7, 82, 35, 21, 24, 59, 60 } };
		for (int i = 0; i < a.length; i++) { // 二维数组的长度
			for (int j = 0; j < a[i].length; j++) { // 每个一维数组的长度
				int n = j + 1;
				for (int m = i; m < a.length; m++) {
					for (; n < a[i].length; n++) {
						if (a[i][j] < a[m][n]) {
							int max = a[m][n];
							a[m][n] = a[i][j];
							a[i][j] = max;
						}
					}
					n = 0; // 此处是给n从第二个一维数组开始取0这个坐标
				}
			}
		}
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < a[i].length; j++) {
				System.out.print(a[i][j] + "   ");
			}
			System.out.println();
		}
	}
 
	// 二维数组全部排序
	public void dAM2() {
		int[][] a = { 
				{ 12, 26, 89, 78, 45, 65, 36 },
				{ 2, 6, 90, 34, 16, 27, 5 }, 
				{ 13, 3, 4, 29, 33, 37, 17 },
				{ 1, 9, 19, 49, 57, 22, 11 }, 
				{ 7, 82, 35, 21, 24, 59, 60 } };
		int b[] = new int[35]; // new一个一维数组，数组长度与二维数组a的所有元素个数是一样的
		for (int i = 0; i < a.length; i++) { // 二维数组长度
			for (int j = 0; j < a[i].length; j++) { // 一维数组的长度
				b[j + i * (a[i].length)] = a[i][j]; // 将俩维数组赋值给一维数组，注意坐标的计算
			}
		}
		for (int i = 0; i < b.length; i++) { // 对一维数组进行选择排序
			for (int j = 0; j < b.length - 1; j++) {
				if (b[j] < b[j + 1]) {
					int t = b[j];
					b[j] = b[j + 1];
					b[j + 1] = t;
				}
			}
		}
		for (int i = 0; i < a.length; i++) { // 再将排完序的一维数组赋值给俩维数组，注意坐标的计算
			for (int j = 0; j < a[i].length; j++) {
				a[i][j] = b[j + i * (a[i].length)];
			}
 
		}
 
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < a[i].length; j++) {
				System.out.print(a[i][j] + "\t");
			}
			System.out.println();
		}
	}
 
	// 二维数组全部排序
	public void dAM3() {
		int[][] b = { 
				{ 12, 26, 89, 78, 45, 65, 36 },
				{ 2, 6, 90, 34, 16, 27, 5 }, 
				{ 13, 3, 4, 29, 33, 37, 17 },
				{ 1, 9, 19, 49, 57, 22, 11 }, 
				{ 7, 82, 35, 21, 24, 59, 60 } };
		for (int w = 0; w < b.length; w++) { // 二维数组的长度
			for (int t = 0; t < b[w].length; t++) { // 一维数组的长度
				for (int i = 0; i < b.length; i++) { // 二维数组的长度
					for (int j = 0; j < b[w].length; j++) { // 一维数组的长度
						if (b[w][t] > b[i][j]) { // 套在for循环里，俩个一模一样的数组进行比较
							int max = 0;
							max = b[i][j];
							b[i][j] = b[w][t];
							b[w][t] = max;
						}
					}
				}
			}
		}
		for (int i = 0; i < b.length; i++) {
			for (int j = 0; j < b[i].length; j++) {
				System.out.print(b[i][j] + "   ");
			}
			System.out.println();
		}
	}
 
	// 方法四：是对每个单独的数组进行由小到大排序
	public void dAM4() { // 对单个的一维数组进行排序
		int[][] a = { 
				{ 12, 26, 89, 78, 45, 65, 36 }, 
				{ 2, 6, 90, 34, 16, 27, 5 }, 
				{ 13, 3, 4, 29, 33, 37, 17 },
				{ 1, 9, 19, 49, 57, 22, 11 }, 
				{ 7, 82, 35, 21, 24, 59, 60 } };
		for (int k = 0; k < a.length; k++) { // 直接调用数组arrays里的sort()这个方法对里边的一维数组进行排序
			Arrays.sort(a[k]);
		}
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < a[i].length; j++) {
				System.out.print(a[i][j] + "   ");
			}
			System.out.println();
		}
 
	}