int[] arr={71,54,58,29,31,78,2,77,87};
System.out.print("排序前:");
for (int i=0;i<arr.length;i++){
System.out.print(arr[i]+" ");
}
System.out.println();
for (int i=0; i<arr.length;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;
}
}
}
System.out.print("排序后:");
for (int i=0;i<arr.length;i++){
System.out.print(arr[i]+" ");
}
采用选择法升序排列数组
int[] arr = {71, 54, 58, 29, 31, 78, 2, 77, 87};
System.out.print("排序前");
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + " ");
}
System.out.println();
for (int i = 0; i < arr.length; i++) {
for (int j = i + 1; j < arr.length; j++) {
if (arr[i] > arr[j]) {
int rec = arr[i];
arr[i] = arr[j];
arr[j] = rec;
}
}
}
System.out.print("排序后");
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + " ");
}