Question

Java中定义一个六个元素数组,并按正序和倒序输出

Java中定义一个六个元素数组,并按正序和倒序输出

Answer 1

‍‍‍‍//定义一个6个元素的int类型数组
int[] arr = {1,2,3,4,5,6};
//正序输出
for(int i=0;i<arr.length;i++){
System.out.println(arr[i]);
}
//倒序输出
for(int i=arr.length-1;i>=0;i--){
System.out.println(arr[i]);
}

Answer 2

int[] arr = { 1, 3, 2, 6, 4, 5 };
int n = arr.length;
int temp;
for (int i = 1; i <= n - 1; i++) {
for (int j = n - 1; j >= 1; j--) {
if (arr[j] > arr[j - 1]) {
temp = arr[j];
arr[j] = arr[j - 1];
arr[j - 1] = temp;
}
}
}

System.out.println("降序排序后:");
for (int i = 0; i < n; i++) {
System.out.print(" " + arr[i]);
}
for (int i = 1; i <= n - 1; i++) {
for (int j = n - 1; j >= 1; j--) {
if (arr[j] < arr[j - 1]) {
temp = arr[j];
arr[j] = arr[j - 1];
arr[j - 1] = temp;
}
}
}
System.out.println();
System.out.println("升序排序后:");
for (int i = 0; i < n; i++) {
System.out.print(" " + arr[i]);
}