比较两个字符串数组

比较两个字符串数组

我想比较两个字符串数组A,B。我想返回和/或显示A,B以及A和B中唯一的元素。我按如下所示调用了我的方法,但是结果错误。如何解决?

A = 1,2,3,4,5;
B = 1,2;
compareStringArray(A,B, true);// true means print results


结果-

--Elements in ONLY A -

3, 5

--Elements in ONLY B -


--Elements in both A & B -

2


码-

public static ArrayList<ArrayList<String>> compareStringArray(
        String[] arrayA, String[] arrayB, boolean display) {

    ArrayList<ArrayList<String>> results = new ArrayList<ArrayList<String>>();
    ArrayList<String> ara = new ArrayList<String>(Arrays.asList(arrayA));
    ArrayList<String> arb = new ArrayList<String>(Arrays.asList(arrayB));
    ArrayList<String> common = new ArrayList<String>();

    for(String s : ara){
        if (arb.contains(s)) {
            common.add(s);
        }// if

    }//for

    for(String s: common){
        if (ara.contains(s)) {
            ara.remove(s);
        }// if

        if (arb.contains(s)) {
            arb.remove(s);
        }// if

    }//for


    results.add(ara);
    results.add(arb);
    results.add(common);

    if (display == true) {

        ArrayList<String> als = null;

        als = results.get(0);
        System.out.println("\n--Elements in ONLY A - \n");
        printArrayListOfStringAsCSV(als);

        als = results.get(1);
        System.out.println("\n--Elements in ONLY B - \n");
        printArrayListOfStringAsCSV(als);

        als = results.get(2);
        System.out.println("\n--Elements in both A & B - \n");
        printArrayListOfStringAsCSV(als);

    }// if

    return results;

}// compare

最佳答案

您的代码正在我的机器上运行(我必须修复main并实施printArrayListOfStringAsCSV这样tsk-tsk)-

public static void main(String[] args) {
  String[] A = { "1", "2", "3", "4", "5" };
  String[] B = { "1", "2" };
  compareStringArray(A, B, true);
}

public static void printArrayListOfStringAsCSV(
    List<String> al) {
  for (int i = 0; i < al.size(); i++) {
    if (i != 0) {
      System.out.print(", ");
    }
    System.out.print(al.get(i));
  }
  System.out.println();
}


我得到了这个输出(对我来说看起来是100%)。

--Elements in ONLY A -

3, 4, 5

--Elements in ONLY B -



--Elements in both A & B -

1, 2

关于java - 使用arraylist比较两个字符串数组,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/20446587/

10-13 01:19