Instance variables or instance fields: these are variables declared inside a class without a static keyword, but outside a method, constructor, or code block. - java learnjava
There are four different types of variables in Java based on where they are declared within a program. We will explain each of them with examples and their differences.these are variables declared inside a class without a static keyword, but outside a method, constructor, or code block. They can be declared at any position inside a class. You can declare them with or without an access modifier like ).
If an instance field is not assigned a value during declaration, it is given a default value of zero if it's a primitive type like or null if it's a non-primitive type like public Main { public static void main { MyClass obj1=new MyClass; MyClass obj2=new MyClass; //Now we can access every 'public' field declared in the MyClass class // from the newly created object 'obj' obj1.anotherInstanceField2=11; obj2.anotherInstanceField2=33; System.out.println; // prints '11' System.out.println; // prints '33' } }
public class MyClass { //static field public static String staticField; public MyClass{} //Constructor } class Main { public static void main { MyClass obj=new MyClass; obj.staticField //will throw Not defined Error //Now we cannot access the static field declared in MyClass class from the // newly created object 'obj' because static fields are not attached to any // object. They belong solely to the class they are declared and can only be // accessed from their class. MyClass.
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