Programming Forums > Application Development > Java

tumbleTetris · May 25th, 2006, 4:01 AM

Just would like two things clarified.

First, is a string the same as a sentance in java?

Secondly, how can I get the user to input a string/sentance and store it in a variable?

Yes, its an easy question, still getting a hang on the basics...

Mjordan2nd · May 25th, 2006, 4:23 AM

A String is just an array of characters. It can be a sentence, but it's by no means limited to only sentences. To get input (I haven't compiled, so there could be possible syntax errors)

(Toggle Plain Text)

import java.io.*;
import java.util.*;

public class Example
{
	 public static void main(String [] args) throws IOException
	 {
		  Scanner keyboard = new Scanner(System.in);
		  String s = keyboard.nextLine(); // this line waits for input from the user and stores it in s
	 }
}

tumbleTetris · May 25th, 2006, 4:26 AM

umm, when I print 's' I only get the first word of the sentance.

Am I supposed to create an array of strings to get a sentence from the user?

Jimbo · May 25th, 2006, 4:32 AM

Or use the .nextLine() method. That will read in until a newline character. Theres also a .next() which takes a Pattern as a parameter, but I'm not entirely sure how patterns work in Java. Check the documentation for more info on those.

tumbleTetris · May 25th, 2006, 4:39 AM

yup, .nextLint() done the trick, thanks

Just one more question, why does Mjordan2nd have import java.io.* in the sourcecode? I'm compiling and running my little class just fine without the import.java.io.*.

Toro · May 25th, 2006, 8:16 AM

Because it's main method throws an IOException. IOException is in the package java.io and it's used for exception handling.

Mjordan2nd · May 25th, 2006, 10:18 AM

Oh god, sorry. I meant nextLine(). 3:00 at night, I wasn't thinking. Anyway, I corrected my mistake. next() will only read the first word. Sorry about that.

May 25th, 2006, 4:01 AM	#1
tumbleTetris Programmer Join Date: May 2006 Posts: 39 Rep Power: 0	Reading a string/sentence from the keyboard. Just would like two things clarified. First, is a string the same as a sentance in java? Secondly, how can I get the user to input a string/sentance and store it in a variable? Yes, its an easy question, still getting a hang on the basics...

May 25th, 2006, 4:23 AM	#2
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	A String is just an array of characters. It can be a sentence, but it's by no means limited to only sentences. To get input (I haven't compiled, so there could be possible syntax errors) (Toggle Plain Text) import java.io.; import java.util.; public class Example { public static void main(String [] args) throws IOException { Scanner keyboard = new Scanner(System.in); String s = keyboard.nextLine(); // this line waits for input from the user and stores it in s } } import java.io.; import java.util.; public class Example { public static void main(String [] args) throws IOException { Scanner keyboard = new Scanner(System.in); String s = keyboard.nextLine(); // this line waits for input from the user and stores it in s } } __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower Last edited by Mjordan2nd; May 25th, 2006 at 10:18 AM.

May 25th, 2006, 10:18 AM	#7
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	Oh god, sorry. I meant nextLine(). 3:00 at night, I wasn't thinking. Anyway, I corrected my mistake. next() will only read the first word. Sorry about that. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

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May 25th, 2006, 4:26 AM	#3
tumbleTetris Programmer Join Date: May 2006 Posts: 39 Rep Power: 0	umm, when I print 's' I only get the first word of the sentance. Am I supposed to create an array of strings to get a sentence from the user?

May 25th, 2006, 4:32 AM	#4
Jimbo Battle Programmer Join Date: Feb 2006 Location: Bellevue, WA, USA Posts: 769 Rep Power: 3	Or use the .nextLine() method. That will read in until a newline character. Theres also a .next() which takes a Pattern as a parameter, but I'm not entirely sure how patterns work in Java. Check the documentation for more info on those.

May 25th, 2006, 4:39 AM	#5
tumbleTetris Programmer Join Date: May 2006 Posts: 39 Rep Power: 0	yup, .nextLint() done the trick, thanks Just one more question, why does Mjordan2nd have import java.io.* in the sourcecode? I'm compiling and running my little class just fine without the import.java.io.*.

May 25th, 2006, 8:16 AM	#6
Toro Hobbyist Programmer Join Date: Apr 2006 Posts: 136 Rep Power: 0	Because it's main method throws an IOException. IOException is in the package java.io and it's used for exception handling.

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Programming Forums > Application Development > Java

Reading a string/sentence from the keyboard.