CODEWITHSUNDEEP
java
user2148463
user2148463

Reputation: 57

Generating reverse words

i am a beginner in java and i am doing practiceit questions off the internet.I tried attempting the question but i dont understand the error.

Write a method called processName that accepts a Scanner for the console as a parameter and that prompts the user to enter his or her full name, then prints the name in reverse order (i.e., last name, first name). You may assume that only a first and last name will be given. You should read the entire line of input at once with the Scanner and then break it apart as necessary. Here is a sample dialogue with the user:

Please enter your full name: Sammy Jankis Your name in reverse order is Jankis, Sammy

public static void processName(Scanner console) {
    System.out.print("Please enter your full name: ");

    String full=console.nextLine();

    String first=full.substring(0," ");
    String second=full.substring(" ");

    System.out.print("Your name in reverse order is: "+ second + "," + first);

}

Maybe i will go about explaining my code.So i try to break the two words apart.So i use substring to find the both words and then i hardcode to reverse them.I think the logic is right but i still get these errors.

Line 6
You are referring to an identifer (a name of a variable, class, method, etc.) that is not recognized. Perhaps you misspelled it, mis-capitalized it, or forgot to declare it?
cannot find symbol
symbol  : method substring(int,java.lang.String)
location: class java.lang.String
    String first=full.substring(0," ");
                     ^
Line 7
You are referring to an identifer (a name of a variable, class, method, etc.) that is not recognized. Perhaps you misspelled it, mis-capitalized it, or forgot to declare it?
cannot find symbol
symbol  : method substring(java.lang.String)
location: class java.lang.String
    String second=full.substring(" ");
                      ^
2 errors
33 warnings

Upvotes: 0

Views: 3064

Answers (5)

Shukhrat Aliyev
Shukhrat Aliyev

Reputation: 11

public class ex3_11_padString {
    public static void main(String[] args) {
        System.out.print("Please enter your full name: ");
        String f_l_Name = console.nextLine();
        String sss[] = f_l_Name.split(" ", 2);
        System.out.print("Your name in reverse order is " + sss[1] + ", " + sss[0]);
    }
}

Upvotes: 0

AmitG
AmitG

Reputation: 10543

go to here http://docs.oracle.com/javase/6/docs/api/java/lang/String.html and read to understand.

Upvotes: 0

Vincent Ramdhanie
Vincent Ramdhanie

Reputation: 103135

Take a look at the documentation for the substring() method. It does not take a string as its second parameter.

  String first=full.substring(0," ");
  String second=full.substring(" ");

What you may want instead is the indexOf() method. First find the index of the space character. Then find the substring up to that point.

  int n = full.indexOf(" ");
  String first=full.substring(o, n); //gives the first name

Upvotes: 1

Pradeep Simha
Pradeep Simha

Reputation: 18123

As per Java API, substring() accepts either one int argument like substring(int beginIndex) and two int arguments like substring(int startIndex, int endIndex) but you are calling with String arguments. So you're getting those errors. More info can be found here String API.

Upvotes: 0

Michał Tabor
Michał Tabor

Reputation: 2467

public static void processName(Scanner console) {
    System.out.print("Please enter your full name: ");

    String[] name = console.nextLine().split("\\s");

    System.out.print("Your name in reverse order is: "+ name[1] + "," + name[0]);

}

Of course it only works if the name has 2 words. For longer names you should write a method which would reverse an array

Upvotes: 1

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