java - 打印字符串数组的替代元素

Question

我在执行打印字符串数组的替代元素的代码时遇到问题。

我已经声明了一个字符串“welcome”，并且我想读取“W、l、o 等”等替代元素

//Print alternate elements of a string array.

public class AlternateStringArray {

   public static void main(String[] args) {

       String str[]= new string[] {"Welcome"};

       for (int i=0; i<7; i+2){

       System.out.println(str[i]);

    }
  }
}

<小时/>

收到以下错误:

Type mismatch: cannot convert from string[] to String[]

Type mismatch: cannot convert from String to string

Syntax error on token "+", invalid AssignmentOperator

请帮忙。

Answer 1

尝试:

String str = "Welcome";
char[] strChars = str.toCharArray();
for(int i = 0; i < strChars.length; i += 2) {  // go through all the characters
    System.out.println(strChars[i]);
}