Java 数组交集的实现代码
以下实例演示了如何使用retainAll()方法来计算两个数组的交集:
Main.java文件:
importjava.util.ArrayList; publicclassMain{ publicstaticvoidmain(String[]args){ ArrayListobjArray=newArrayList(); ArrayListobjArray2=newArrayList(); 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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