【数据结构】判断数组中是否有重复元素的java实现
package dataStructure;
public class MyRepeatNum {
static boolean isRepeatNum(int a[]) {
int sum = 0;
int n = a.length;
for(int i : a) {
sum += i;
}
if(sum == n*(n+1)/2) return false;
return true;
}
public static void main(String[] args) {
int array_1[] = {1,2,3,4,5};
int array_2[] = {2,2,3,3,6};
System.out.println("数组array_1中是否出现了重复数字："+isRepeatNum(array_1));
System.out.println("数组array_2中是否出现了重复数字："+isRepeatNum(array_2));
}
}