求给定的两个数组的公共元素，并将其返回为一个数组

如数组a:1,3,4,5,6,7,2

数组b:3,6,0,2

则方法返回数组c:{2,3,6}

package test3;

import java.util.Arrays;

public class findCommonData {

	public static int[] getCommon(int []array1, int []array2){
		int[] array3;
		int i=0,j=0,k=0;
		
		Arrays.sort(array1);//排序 
		Arrays.sort(array2);
		if(array1.length < array2.length){//定义数组3，长度尽量小
			array3 = new int[array1.length];
		}else{
			array3 = new int[array2.length];
		}
		while( i< array1.length && j array2[j]){
				j++;
			}else if(array1[i] < array2[j]){
				i++;
			}else{
				array3[k] = array1[i];
				i++;
				j++;
				k++;
			}
		}
		array3 = Arrays.copyOf(array3, k);//祛除公共元素以外的初始值0
		return array3;
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int []array1 = {1,2,3,4,5,6,7};
		int []array2 = {12,4,5,16,27,85,3};
		int []array3;
		
		array3 = getCommon(array1, array2);
		for(int data:array3){
			System.out.println(data);
		}
	}
}

运行结果：

3
4
5