Java 教程
Java 實(shí)例 - 數(shù)組交集
Java 實(shí)例以下實(shí)例演示了如何使用 retainAll () 方法來(lái)計(jì)算兩個(gè)數(shù)組的交集：
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 數(shù)組元素："+objArray);
System.out.println("array2 數(shù)組元素："+objArray2);
objArray.retainAll(objArray2);
System.out.println("array2 & array1 數(shù)組交集為："+objArray);
}
}
以上代碼運(yùn)行輸出結(jié)果為：
array1 數(shù)組元素：[common1, common2, notcommon2] array2 數(shù)組元素：[common1, common2, notcommon, notcommon1] array2 & array1 數(shù)組交集為：[common1, common2]其他擴(kuò)展