在java中不从字符串中修剪未完成的单词

Question

在我的程序中，我必须在有限的字符范围内修剪这个短语。代码工作正常，直到短语长到字符的限制，因为没有修剪未完成的单词。

import java.lang.*;
class Trim{
   public String trim(String message, int K)
   {
       //Checking message non-empty condition, K value and
       //message length
       if(message==""|| message.length()>500 || K>500|| message.substring(0)==" " || message.charAt(message.length()-1) == ' ')
       {
           System.out.println("Message is non-empty and K should have value between 1-500");
           System.exit(0);
       }
       String crop;
 
       //Length of message
       int len=message.length();
 
       //if K value greater than length return message
       if(K>=len)
           return message;
 
       //Crop message until given value
           crop=message.substring(0,K);
 
       //Checking middle value or not
       if((message.substring(K+1)==" ")&&(message.substring(K-1)!=" "))
           return crop;
 
       //Checking crop message with actual length
       if(crop.length()==K)
           return crop;
 
       //Remove last character
       while(crop.length() >0 && crop.charAt(crop.length()-1) != ' '){
           crop=crop.substring(0,crop.length()- 1);
       }
 
       //Remove space
       while(crop.length() >0 && crop.charAt(crop.length()-1) == ' '){
           crop=crop.substring(0, crop.length() - 1);
       }
       return crop;
   }
}

class Main{
 
   public static void main(String[] args) {
 
       Solution s=new Solution();
 
       String message="The code is not trimming entire character";
       System.out.println(s.solution(message,18));
       String message1="no problem";
       System.out.println(s.solution(message1,100));
       String message2="The quick brown fox jumps over the lazy dog";
       System.out.println(s.solution(message2,39));
   }
}

Answer 1

Java String中的trim（）方法是一个内置函数，它消除了前导空格和尾随空格。空格字符的Unicode值为'\u0020'。java中的trim（）方法在字符串前后检查这个Unicode值，如果它存在，则移除空格并返回省略的字符串。trim（）方法还有助于裁剪Java中的字符。

Note: The trim() method doesn’t eliminate middle spaces.

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方法签名：

公共字符串修剪（）

类Gfg{

// driver code
public static void main(String args[])
{

    // trims the trailing and leading spaces
    String s = " geeks for geeks has all java functions to read  ";
    System.out.println(s.trim());

    // trims the leading spaces
    s = " Chetna loves reading books";
    System.out.println(s.trim());
}

}输出

geeks for geeks有所有的java函数来阅读Chetna爱读书

  String s1 = "   Geeks For Geeks   ";
   
  // Before Trim() method
  System.out.println("Before Trim() - ");
  System.out.println("String - "+s1);
  System.out.println("Length - "+s1.length());
   
  // applying trim() method on string s1
  s1=s1.trim();
   
  // After Trim() method
  System.out.println("\nAfter Trim() - ");
  System.out.println("String - "+s1);
  System.out.println("Length - "+s1.length());
   
}

前Trim（）-string-geeks For Geeks
长度-21

Trim（）-strink-geeks For Geeks长度-15 plzz如果你想回答，请投票