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[java] strings and objects

Started by omegasyphon Apr 13, 2003 at 3:05 PM 5 replies 300+ views

Original Post

omegasyphon

Apr 13, 2003 at 3:05 PM

a simple java question but i cant seem to figure it out. how do i do this how do i concat an object to a string?

yaroslavd

Apr 13, 2003 at 4:48 PM

Each class extends java.lang.Object. The Object class has a method: public String toString (). This method automatically gets called when you try to do what you are trying to do.

For example:

public class Hi

{
String hey;

Hi () { hey = "Hey"; }

public String toString () { return hey; }

public static void main ( String args[] )

{ System.out.println ( new Hi () ); }
}

This will print out "Hey."

CaptainJester

101

CaptainJester

Apr 14, 2003 at 5:45 AM

You have to iterate through the list yourself and get each one.

First make it work,
then make it fast.
--Brian Kernighan

"I’m happy to share what I can, because I’m in it for the love of programming. The Ferraris are just gravy, honest!" --John Carmack: Forward to Graphics Programming Black Book

yaroslavd

Apr 14, 2003 at 9:43 PM

Post the code. How are we supposed to help you with your problem if we don''t know what the problem is?

capn_midnight

404

capn_midnight

Apr 17, 2003 at 12:21 PM

it depends, are you storing the numbers as "int" or as "Integer"?

bslayerw

Apr 20, 2003 at 11:23 AM

If he is using the Java Collection API then he would have to be using Integer since the Collection API stores everything as Object.

    
Iterator it = myIntegerList.iterator();//could be ArrayList ?

StringBuffer integerString = new StringBuffer();
while(it.hasNext())
{
    Integer tmpInt = (Integer)it.next();//this line is to make it a little clean

    integerString.append(tmpInt.toString());
    integerString.append(" ");//add a space

}

System.out.println(integerString.toString());

something along those lines. I didn't compile it

[edited by - bslayerw on April 20, 2003 12:24:35 PM]

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