Newbie Coding Challenge Help

[Zigster]

Hello, I'm brand new to Java and I've been reading and watching many tutorials and now trying to do some basic coding on my own from this website: JavaRanch Cattle Drive.

The first challenge is to write a program that gets input from the user (the users name) and then prints it 100 times. I've been trying to set up a loop, but I can't get it to work properly (it just prints the name once and stops).

Here is my code:


import java.util.Scanner;
public class Gertrude {
public static void main(String args[]){

Scanner name = new Scanner(System.in);

int i = 0;

while(i < 101 )

{
System.out.println(name.nextLine());
i++;

}
}

}

What am I doing wrong?

Thanks!

[shahrukh1]

try this

BufferedReader reader;

        reader = new BufferedReader(new InputStreamReader(System.in));

        System.out.println("What is your move?");

        String name = reader.readLine();

for (int i =0; i<101;i++)
System.out.println(name);

[Fubarable]

Hello, I'm brand new to Java and I've been reading and watching many tutorials and now trying to do some basic coding on my own from this website: JavaRanch Cattle Drive.

Welcome to the Java-Forms.org!

The first challenge is to write a program that gets input from the user (the users name) and then prints it 100 times. I've been trying to set up a loop, but I can't get it to work properly (it just prints the name once and stops).
What am I doing wrong?

Since you know how many times that you want to loop before the loop begins, use a for loop, not a while loop. Get your String from the user before the loop.

[Zigster]

Thanks guys!

So, with this code:

import java.util.Scanner;
public class Gertrude {
public static void main(String args[]){

Scanner name = new Scanner(System.in);

for (int i = 0; i < 101; i++)
System.out.println(name);
}
}

I get: java.util.Scanner[delimiters=\p{javaWhitespace}+][position=0][match valid=false][need input=false][source closed=false][skipped=false][group separator=\,][decimal separator=\.][positive prefix=][negative prefix=\Q-\E][positive suffix=][negative suffix=][NaN string=\Q?\E][infinity string=\Q?\E]

100 times, lol. Still not really sure what's going on?

[shahrukh1]

try the code i had used

[Zigster]

So I tried that code before:

public class test2 {
public static void main(String args[]){
BufferedReader reader;

reader = new BufferedReader(new InputStreamReader(System.in));

System.out.println("What is your move?");

String name = reader.readLine();

for (int i =0; i<101;i++)
System.out.println(name);
}
}

And I get:


Exception in thread "main" java.lang.Error: Unresolved compilation problems:
BufferedReader cannot be resolved to a type
BufferedReader cannot be resolved to a type
InputStreamReader cannot be resolved to a type
Syntax error, insert "}" to complete ClassBody

at test2.main(test2.java:4)

[shahrukh1]

sorry, add this to the very top of your code,

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

also, you main method make it like this

public static void main(String[] args) throws IOException

you have to import the precompiled libraries for Buffered Reader (you may not understand now, but will understand for sure later)
now the "throws IOException" i have so that if the reader encounters an "error" it just ignores it, for now this is fine, but later u will learn how to properly handle errors

[Zigster]

Thanks, it works!

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class test2 {
public static void main(String[] args) throws IOException{

BufferedReader reader;

reader = new BufferedReader(new InputStreamReader(System.in));

System.out.println("What is your name?");

String name = reader.readLine();

for (int i =0; i<101;i++)
System.out.print(name + " ");
}
}

[DarrylBurke]

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