java 基本排序

      int[] arr={5,4,2,4,9,1};   

        //选择排序
        for (int i = 0; i < arr.length-1; i++) {
            for (int j = i+1; j < arr.length; j++) {
                if(arr[i]>arr[j]) {
                    int temp=arr[i];
                    arr[i]=arr[j];
                    arr[j]=temp;
                }
            }
        }

//冒泡排序
                for (int i = 0; i < arr.length-1; i++) {
                    for (int j =0; j < arr.length-1-i; j++) {
                        if(arr[j]>arr[j+1]) {
                            int temp=arr[j];
                            arr[j]=arr[j+1];
                            arr[j+1]=temp;
                        }
                    }
                }