字符串操作替換和反向（for循環）

Question

我有問題顯示輸出在不同的代碼行我怎麼能這樣做？

package replaceandreverse; 

import java.util.Scanner; 

public class ReplaceAndReverse { 


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

     String newsen="";//parameter 1 will contain the new sentence 
     String temp="";//parameter 2 will be use a temporary memory to save the replace string process 

     Scanner src = new Scanner(System.in);  //instantiate scanner 
     System.out.println("Enter the sentence:"); //display Enter sentence 
     String s = src.nextLine();     //take user input also string s is the 3rd paramter which saves the string inputed 

    //**************************************************************************************************************************************** 

     System.out.println("Enter the word to be replaced:"); //display Enter the word to be replaced 
     String replace = src.next();       // take user input 
     System.out.println("Enter the word with which it is to be replaced:"); //Display Enter the word with which it is to be replaced 
     String replacewith = src.next();  //take user input for the letter to with which to replace the previously inputed word. 
     s=s+" ";//add to s 

    //**************************************************************************************************************************************** 
     //loop to perform the replace process 
     // is on for loop which contains nested if-else loop 
     for(int i=0;i<s.length();i++) 
     { 
      char x=s.charAt(i);// turning string to char 
      if(x!=' ') 
      { 
       temp=temp+x; 
      }//end of if loop 1 
      else 
      { 
       if(replace.equals(temp)) 
       { 
        newsen=newsen+replacewith; 
       }//end of if loop 2 
       else 
       { 
        newsen=newsen+temp; 
       }//end of else loop 1 

       newsen=newsen+" "; 
       temp=""; 

      }//end of else loop 2 

     }//end of for loop for the replace process 

    //****************************************************************************************************************************************  

     System.out.println("The new sentence is :"+" "+newsen); //display the new sentence with the new sentence 

     System.out.print("The reverse sentence is :"); //display the reverse sentence is 

    //**************************************************************************************************************************************** 

     //loop to print the words in reverse 
     for(int i=newsen.length()-1; i>=0; i--) 
     { 

     System.out.print(newsen.charAt(i)); // display reverse sentence 

     }//end of loop to reverse string 

    //**************************************************************************************************************************************** 

    }//end of main 
}//end of class 

Answer 1

使用nextLine（）函數而不是next（）。這將抓住用戶輸入的所有內容。爲此，如果您執行以下

System.out.println("Enter the word to be replaced:"); //display Enter the word to be replaced 
String replace = src.nextLine(); // take the entire user input 
System.out.println("Enter the word with which it is to be replaced:"); //Display Enter the word with which it is to be replaced 
String replacewith = src.nextLine(); // take the entire user input 

你得到正確的輸出

Enter the sentence: 
my name is ryan 
Enter the word to be replaced: 
name 
Enter the word with which it is to be replaced: 
pizzapie 
The new sentence is : my pizzapie is ryan 
The reverse sentence is : nayr si eipazzip ym