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Any idea why this won't compile please?


/**
* Java Program which tries to implement variable argument method using
* method overloading. This started get clumsy once number of parameter exceeds
* five.
*/
class VarargsExample{

/*
* @return multiplication of all numbers in array
*/
public ...

okay I will have a look, thanks

ben_josephs wrote:How you do it depends on the requirements of whatever function you're going to pass it to.

And I've never done it, so I don't have an example.

Oh ic, well I am reading the document at http://www.unicode.org/versions/Unicode6.1.0/ch02.pdf.

Indeed. The page you refer to also explains
Code points from the other planes (called Supplementary Planes) are encoded in UTF-16 by pairs of 16-bit code units called a surrogate pair...

Did you read the whole of that page or the Oracle Java page it refers to?
Yes, but I am down with coffee ...

Java's chars are 16 bits (4 hex digits) wide, enough to hold the characters of the basic multilingual plane.

If you need to use wider ("supplementary") characters you'll have to use surrogate pairs.

Or ints.

UTF-16 (16-bit Unicode Transformation Format) is a character encoding for Unicode ...

Why is the following incorrect syntax?

class CharactersInPlay
{

public static void main (String[] args)
{
char a = 'u\16848'; //I tried escaping i.e. 'u\\16848', and, also other characters
System.out.println(a);
}

}

References
Banum Unicode Chart at http://www.unicode.org/charts/PDF/U16800 ...

Oops, sorry about that, I should take coffee before coding

The following code does not compile in TextPad 5.4.2, although similar code compiles within Eclipse.


import java.text.*;
import java.util.*;
class DateFormatPlay
{
Calendar c = Calendar.getInstance();
c.set(2012, 11, 25); //christmas day due to zero based indexed month
Locale l = new Locale ...

It would be nice if the developers of TextPad 5.4.2 decided to implement the functionality which automatically runs the following command when an assert statement is detected in the code. The option is commonly accessible through Tools > External Tools > Compile (Ctrl + 1).


class Assertion ...

I found a solution.

file TestOne.java lies in a folder called one (otherwise, package one; would make no sense).

so to find the way from TestOne to one/Dog.java, the classpath needs to contain the folder containing folder one (either relatively referenced by .. or as absolute path)

Microsoft ...

The following does not compile within TextPad 5.4.2, and, the support team commonly tells me that they do not support these issues, so I write them here. I cannot force them to understand a bug if they do not want to listen.

It works within Eclipse.


Dog.java
package one;
class Dog
{
public Dog ...

How is your classpath configured? Does it contain . (dot = current directory)?
Yep

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Jon>echo %CLASSPATH%
.;C:\Program Files\Java\external_jars\junit4.9b2\junit4.9b2\junit-4.9b2.jar;C:\P ...

package food;
class Dog
{

}
package food;
class Terrier extends Dog
{
void walk()
{
System.out.println("Terrier walks");
}
}


Error
C:\Documents and Settings\Jon\Desktop\food\Terrier.java:2: error: cannot find symbol
class Terrier extends Dog
^
symbol: class Dog
1 error

Tool ...

"Instance methods can be overridden only if they are inherited by the subclass.
A subclass within the same package as the instance's superclass can override
any superclass method that is not marked private or final.

A subclass in a
different package can override only those non- final methods ...

your class CheckboxFrame is in a different package (musiccollection). So without import or fully qualified class name, it is not visible for MusicCollectionUI in package musicrecord.

Btw, usually, package names (except for java's own packages) start with a top level domain, then the domain owned ...