1.How can the java programme work with a non-static variable inside static main function?
your are limited in the use of variable for instace variable only
It is quite normal because when you declare something static this belong to the class and not to one of the instance of a class. So you can use local variable inside your static methode or you can instantiate an object of the required (locally) type inside your static methode and access the instance variable of this class by a getter :more explicitly
public class TestStatic
{
private
String myInstanceVariable;
public TestStatic()
{
this.myInstanceVariable = "aString";
System.out.println("constructor instantiate : "+this.myInstanceVariable);
}
public static void main(String[] args)
{
TestStatic.toUpperCase();
}
public static String toUpperCase()
{
TestStatic aTestStaticInstance = new TestStatic();
String upper = aTestStaticInstance.getMyInstanceVariable().toUpperCase();
System.out.println("static methode return : "+upper);
return upper;
}
public String getMyInstanceVariable()
{
return this.myInstanceVariable;
}
}
this kind of thing is often use in the singleton
pattern..
Y
2.What is the difference between static main function with static user define function?
What i know is that the main function is the function directly called by the java VM and the parameter are the one set on call to the java VM.
if someone have more information about it.......
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Benjamin l�onard
evisor
