题目

不好了！Timmy没有非常仔细地遵循指示，忘记了如何使用新的字符串模板功能，帮助Timmy使用他的字符串模板，以便按预期工作！

public class Kata 
{
    public static String buildString(String... args)
    {
      return
    }
}

测试用例：

import org.junit.Test;
import static org.junit.Assert.assertEquals;
import org.junit.runners.JUnit4;


public class BuildStringTest {
    @Test
    public void fixedTests() {
      assertEquals(Kata.buildString("Cheese","Milk","Chocolate"),"I like Cheese, Milk, Chocolate!");
      assertEquals(Kata.buildString("Cheese","Milk"),"I like Cheese, Milk!");
      assertEquals(Kata.buildString("Chocolate"),"I like Chocolate!");
    }
}

解题

My

public class Kata 
{
    public static String buildString(String... args)
    {
      return String.format("I like %s!",String.join(", ",args));
    }
}

后记

我想了好一会才想起String.join()的用法，尬呀。