java problem

[Zunon]

SOLVED REQUESTING LOCK


hi, im zunon im 13 yrs old and im learning java, while reading the book :
Java: a beginners guide fifth edition i stumbled upon the same error twice:
when I copy the code shown in the book and try to compile them I get an error in javac but when I copy and paste the exact same code from the file from the website it compiles and runs perfectly, I tried to spot and eliminate every difference I find in the 2 texts can you help me and find the differences I couldn't find?

My version of the code:

/*
   This program illustrates the differences
   between int and double.
  
   Call this file Example3.java
*/
class Example3 {
  public static void main(String args[]) {
    int var;  // this declares an int variable
	double x; // this declares a floating-point variable
	
	var = 10; // assign var the value 10
	
	x = 10.0; // assign x the value 10.0
	
	System.out.printIn("Original value of var: " + var);
	System.out.printIn("Original value of x: " + x);
	
	System.out.printIn(); // print a blank line
	
	// now, divide both by 4
	var = var / 4;
	x = x / 4;
	
	System.out.printIn("var after division: " + var);
	System.out.printIn("x after division: " + x);
  }
}

the supplied one from the book:

/*  
   This program illustrates the differences 
   between int and double. 
 
   Call this file Example3.java. 
*/  
class Example3 {  
  public static void main(String args[]) {  
    int var;  // this declares an int variable 
    double x; // this declares a floating-point variable 
 
    var = 10; // assign var the value 10 
    
    x = 10.0; // assign x the value 10.0 
 
    System.out.println("Original value of var: " + var); 
    System.out.println("Original value of x: " + x); 
 
    System.out.println(); // print a blank line 
 
    // now, divide both by 4 
    var = var / 4;  
    x = x / 4; 
 
    System.out.println("var after division: " + var); 
    System.out.println("x after division: " + x); 
  }  
}

[JosAH]

What did your compiler complain about? (copy the error message verbatim here please).

kind regards,

Jos

[Zunon]

Example3.java:16: error: cannot find symbol
System.out.printIn("Original value of var: " + var);
^
symbol: method printIn(String)
location: variable out of type PrintStream
Example3.java:17: error: cannot find symbol
System.out.printIn("Original value of x: " + x);
^
symbol: method printIn(String)
location: variable out of type PrintStream
Example3.java:19: error: cannot find symbol
System.out.printIn(); // print a blank line
^
symbol: method printIn()
location: variable out of type PrintStream
Example3.java:25: error: cannot find symbol
System.out.printIn("var after division: " + var);
^
symbol: method printIn(String)
location: variable out of type PrintStream
Example3.java:26: error: cannot find symbol
System.out.printIn("x after division: " + x);
^
symbol: method printIn(String)
location: variable out of type PrintStream
5 errors

[Tolls]

And please use [code] tags [/code] when posting code.

[Tolls]

That's a lower case 'L' in println, not an 'I'.

[Zunon]

no I'm pretty sure that's an I using np++ I can see the difference between I and l

[JosAH]

Turn on the light above your computer screen and check again.

kind regards,

Jos

[Zunon]

Turn on the light above your computer screen and check again.

kind regards,

Jos

it's already clear, it's midday and I triple-checked and I'm pretty sure that's an 'I'
thank you - Zunon

[JosAH]

it's already clear, it's midday and I triple-checked and I'm pretty sure that's an 'I'
thank you - Zunon

Just for the fun of it, change the capital 'I' to a lower case 'l' and see for yourself.

kind regards,

Jos

[Zunon]

Just for the fun of it, change the capital 'I' to a lower case 'l' and see for yourself.

kind regards,

Jos

OH ... I thought it should be with an I not an L, I didn't know that ... Sorry for arguing, I'm too stupid to have seen that.


Thank you alot for showing me

[Zunon]

I just downloaded Eclipse and I see that PrintIn is wrong but Println in right... but what does the Ln part mean? Requesting lock for thread

[Tolls]

It's shorthand for "line".
So "print line".

Don't ask me why they shortened it, but I suspect it's a C++ stdlib throwback.