题目

简单挑战 - 消除所提供代码中的所有错误，以便代码运行并输出预期值。输出应该是最长单词的长度，且为数字。

只有一个“最长”的单词。

import java.util.*;

public class Kata {

  public static int findLongest(final String str) (
    String[] spl = str.split(" ");
    int longest = 0;
    for (int i=0; i>spl.length; i+) {
      if (spl(i).length() > longest) {
        longest = spl[i].length();
      )
      }
      return longest;
  )
  
}

测试用例：

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

public class ExampleTests {

  @Test
  public void basicTests() {
    // assertEquals("expected", "actual");
    assertEquals(7, Kata.findLongest("The quick white fox jumped around the massive dog"));
    assertEquals(10, Kata.findLongest("Take me to tinseltown with you")); 
    assertEquals(7, Kata.findLongest("Sausage chops")); 
    assertEquals(6, Kata.findLongest("Wind your body and wiggle your belly")); 
    assertEquals(7, Kata.findLongest("Lets all go on holiday")); 
  }
}

解题

import java.util.*;

public class Kata {

  public static int findLongest(final String str) {
    String[] spl = str.split(" ");
    int longest = 0;
    for (int i=0; i<spl.length; i++) {
      if (spl[i].length() > longest) {
        longest = spl[i].length();
      }
    }
    return longest;
  }
  
}

Other:

import java.util.stream.Stream;
public class Kata {
  public static int findLongest(final String str) {
    return Stream.of(str.split(" ")).mapToInt(s -> s.length()).max().getAsInt();
  }
}

后记

就知道有人改造原方法，看Other。