Contents - Cultural View

Java syntax 190
There are also static constructors, whose purpose is to initialize static fields when the class is initialized. They are
declared using static keyword:
class Foo {
}
static {
}
//Initialization
Since Java has a garbage collection mechanism, there are no destructors. However, every object has a finalize()
method called prior to garbage collection which could be overridden to implement finalization.
Methods
All the statements in Java must reside within methods. Methods are similar to functions except they belong to
classes. A method has a return value, a name and usually some parameters initialized when it is called with some
arguments. Similar to C++, methods which return nothing have return type declared as void. Unlike in C++, methods
in Java are not allowed to have default argument values and methods are usually overloaded instead.
class Foo {
}
int bar(int a, int b) {
}
return (a * 2) + b;
int bar(int a) { /* Overloaded method with the same name but
}
return a * 2;
different set of arguments */
A method is called using . notation on a specific variable, or as in the case of static methods, the name of a type.
Foo foo = new Foo();
int result = foo.bar(7, 2); // Non-static method is called on foo
int finalResult = Math.abs(result); // Static method call
Methods throwing exceptions use throws keyword to indicate that. All checked exceptions are mandatory to be
declared.
void openStream() throws IOException { // Indicates that IOException may be thrown
}