Java实现三大简单排序算法

一、选择排序

public static void main(String[] args) {
    int[] nums = {1,2,8,4,6,7,3,6,4,9};
    for (int i=0; i<nums.length; i++) {
        for (int j=i+1; j<nums.length; j++) {
            if (nums[i] > nums[j]) {
                int temp = nums[i];
                nums[i] = nums[j];
                nums[j] = temp;
            }
        }
    }
    for (int i=0; i<nums.length; i++) {
        System.out.print(nums[i] + " ");
    }
}

 

二、冒泡排序

public static void main(String[] args) {
    int[] nums = {1,2,8,4,6,7,3,6,4,9};
    for (int i=1; i<nums.length; i++) {
        for (int j=0; j<nums.length-i; j++) {
            if (nums[j] > nums[j+1]) {
                int temp = nums[j];
                nums[j] = nums[j+1];
                nums[j+1] = temp;
            }
        }
    }
    for (int i=0; i<nums.length; i++) {
        System.out.print(nums[i] + " ");
    }
}

 

三、插入排序

public static void main(String[] args) {
    int[] nums = {1,2,8,4,6,7,3,6,4,9};
    for (int i=1; i<nums.length; i++) {
        for (int j=i; nums[j]<nums[j-1]; j--) {
            int temp = nums[j];
            nums[j] = nums[j-1];
            nums[j-1] = temp;
        }
    }
    for (int i=0; i<nums.length; i++) {
        System.out.print(nums[i] + " ");
    }
}