Java 实例 - 数组交集
Java数组交集,使用 retainAll () 方法来计算两个数组的交集
Main.java 文件
import java.util.ArrayList;
public class Main {
public static void main(String[] args) {
ArrayList objArray = new ArrayList();
ArrayList objArray2 = new ArrayList();
objArray2.add(0,"common1");
objArray2.add(1,"common2");
objArray2.add(2,"notcommon");
objArray2.add(3,"notcommon1");
objArray.add(0,"common1");
objArray.add(1,"common2");
objArray.add(2,"notcommon2");
System.out.println("array1 数组元素:"+objArray);
System.out.println("array2 数组元素:"+objArray2);
objArray.retainAll(objArray2);
System.out.println("array2 & array1 数组交集为:"+objArray);
}
}
public class Main {
public static void main(String[] args) {
ArrayList objArray = new ArrayList();
ArrayList objArray2 = new ArrayList();
objArray2.add(0,"common1");
objArray2.add(1,"common2");
objArray2.add(2,"notcommon");
objArray2.add(3,"notcommon1");
objArray.add(0,"common1");
objArray.add(1,"common2");
objArray.add(2,"notcommon2");
System.out.println("array1 数组元素:"+objArray);
System.out.println("array2 数组元素:"+objArray2);
objArray.retainAll(objArray2);
System.out.println("array2 & array1 数组交集为:"+objArray);
}
}
以上代码运行输出结果为:
array1 数组元素:[common1, common2, notcommon2] array2 数组元素:[common1, common2, notcommon, notcommon1] array2 & array1 数组交集为:[common1, common2]
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