Source Code For Pre-defined Methods?

Jul 11, 2014

1.Is there any way by which i can see what is happening inside pre defined methods.

i.e. can i see there source code?

2.Somewhere i learned how to see the content of a pre defined class i.e. by using:

javap java.io.classname

but i dont know what javap means!

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Difficulties With User Defined Variable In Multiple Methods

Apr 9, 2015

I'm trying to build a program that will output what will ultimately look like a simple mario level turned on its side. As part of my output I need the user to define what mario looks like. I do this using Scanner and save the input to String mario. When I try to use that variable in another method it gives me troubles.

import java.util.Scanner;
public class Mario2

public static void mario() {
//user defines mario
String mario = ">->O";
Scanner keys = new Scanner(System.in);
System.out.println("What does mario look like?");
mario = keys.next();
System.out.println("Mario now looks like: " + mario);
 
[code]....

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Does the statement above mean the following should compile fine ?

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public class Animal{ }
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The author gives an example saying that if you have a class Multiple.java and in that class, you have:

public class Multiple{}, then it should compile.

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[Code] .....

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Apr 8, 2015

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So far, I've got this

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import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
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[code]....

The problem I have is when I change the last parameter in this line:

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to

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i.e. the generic alternative, I get this error message:

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[Code] ....

So my program can extract each line from the source code of a website and display it, but realistically I want it to extract each WORD as such from the source code rather than every line. I've looked around online but I don't really know how it's done because I keep getting errors when I use input.read();

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[code]...

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import java.util.*;
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May 5, 2014

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[Code] ....

Here is what the output should look like.

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RANG: VALID
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Dec 3, 2014

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[code]....

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[Code] .....

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