查找重复元素

/**
 * 查找重复元素
 * @author 华伟科技
 */
public class Demo {
	public static void main(String[] args) {
		int[] my_array = { 1, 2, 5, 5, 6, 6, 7, 2, 9, 2 };
		findDupicateInArray(my_array);
	}
	public static void findDupicateInArray(int[] a) {
		int count = 0;
		for (int j = 0; j < a.length; j++) {
			for (int k = j + 1; k < a.length; k++) {
				if (a[j] == a[k]) {
					count++;
				}
			}
			if (count == 1) {
				System.out.println("重复元素 : " + a[j]);
			}
			count = 0;
		}
	}
}

public static void main(String[] args) {
        String[] str = { "Z", "H", "A", "N", "G", "H", "O", "N", "G", "W", "E", "I"};
        List<String> list = new ArrayList<String>();    
        for (int i=0; i<str.length; i++) {    
            if(!list.contains(str[i])) {    
                list.add(str[i]);    
            }    
        }    
		for (int i = 0; i < list.size(); i++) {
			System.out.println(list.get(i));
		}
    }