Question

创建一个包含以下静态方法的StringDemo类： •一种接受句子的方法，使用单个空格对其进行标记，然后仅打印以“pre”开头的单词。 •声明2个变量并将其初始化为您选择的句子的主要方法;然后使用2个句子测试您在上一步中定义的方法。

我的尝试

import java.util.ArrayList;
public class StringDemo{
public static void main(String... args){
    String S1 = "We love prefix  that have car strongly wheels and car 
 seats";
    String S2 = "I have a lovely designed car that has many car features 
  beautifully and the car has a good car";

    printWordsWithPre(S1);
    printWordsWithPre(S2);

    System.out.println(printWordsWithPre(S1));
    System.out.println(printWordsWithPre(S1));

    }
  //-   Tokenises a string/sentence and prints only the words that end with 
   ly.
    public static void printWordsWithPre(String str){
    String[] sTokens = str.split("\\p{javaWhitespace}");
    for(int i = 0; i < sTokens.length; i++){
        if(sTokens[i].endsWith("pre")){
            System.out.println(sTokens[i]);
        }
    }
}

Answer 1

您使用{{1}}代替{{1}}

Answer 2

请尝试以下代码：

import java.util.ArrayList;
public class StringDemo{

    public static void main(String... args){
        String S1 = "We love prefix  that have car strongly wheels and car  seats";
        String S2 = "I have a lovely designed car that has many beautifully predesigned car features and the car has a good prebuilt car";

        printWordsWithPre(S1);
        printWordsWithPre(S2);

        // These functions don't return any data so they can't be printed. The results are already printed in the function above.
        /*System.out.println(printWordsWithPre(S1));
        System.out.println(printWordsWithPre(S1));*/
    }
    // Tokenises a string/sentence and prints only the words that starts with pre.
    public static void printWordsWithPre(String str){
        String[] sTokens = str.split("\\p{javaWhitespace}");
        for(int i = 0; i < sTokens.length; i++){
            //check if it starts with rather than ends with
            if(sTokens[i].startsWith("pre")){
                System.out.println(sTokens[i]);
            }
        }
    }

}

我做了以下更改：

添加了一些以pre开头的单词;
删除了System.out.println 在主要因为他们试图打印空虚回归;
改变了结局 to startsWith。

仅从Java开始打印单词

2 个答案: