[数据结构与算法]Java数据结构-简单排序

一、冒泡排序BubbleSort

public class InsertSort {
	
	public static void sort(long[] arr) {
		long tmp = 0;
		
		for(int i = 1; i < arr.length; i++) {
			tmp = arr[i];
			int j = i;
			while(j > 0 && arr[j] >= tmp) {
				arr[j] = arr[j - 1];
				j--;
			}
			arr[j] = tmp;
		}
	}
}

二、插入排序InsertSort

public class InsertSort {
	
	public static void sort(long[] arr) {
		long tmp = 0;
		
		for(int i = 1; i < arr.length; i++) {
			tmp = arr[i];
			int j = i;
			while(j > 0 && arr[j] >= tmp) {
				arr[j] = arr[j - 1];
				j--;
			}
			arr[j] = tmp;
		}
	}
}

三、选择排序SelectionSort

public class SelectionSort {
	
	public static void sort(long[] arr) {
		int k = 0;
		long tmp = 0;
		for(int i = 0; i < arr.length - 1; i++) {
			k = i;
			for(int j = i; j < arr.length; j++) {
				if(arr[j] < arr[k]) {
					k = j;
				}
			}
			tmp = arr[i];
			arr[i] = arr[k];
			arr[k] = tmp;
		}
	}
}

四、调用测试

public class TestSort {
	public static void main(String[] args) {
		long[] arr = new long[5];
		arr[0] = 34;
		arr[1] = 23;
		arr[2] = 2;
		arr[3] = 1;
		arr[4] = -4;
		
		System.out.print("[");
		for(long num : arr) {
			System.out.print(num + " ");
		}
		System.out.print("]");
		System.out.println();
		
		InsertSort.sort(arr);
		
		System.out.print("[");
		for(long num : arr) {
			System.out.print(num + " ");
		}
		System.out.print("]");
		System.out.println();
		
	}
}