黑马期中考试(字符串替换)

package exam;

import java.util.ArrayList;
import java.util.List;

public class Test3 {
    public static void main(String[] args) {
        String[] str = {"beijing", "shanghai", "tianjin", "chongqing"};
        String s = "a";
        List<String> newList = handleString(str, s);
        System.out.println("newList = " + newList);
    }

    private static ArrayList<String> handleString(String[] arr, String str) {
        ArrayList<String> list = new ArrayList<>();
        for (int i = 0; i < arr.length; i++) {
            if (arr[i].contains(str)){
                list.add(arr[i].replace(str,"*"));
            }
        }
        return list;
    }
}