What is difference between class varibales and local variables..??

Answer 1

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Answer 2

A class variable is declared inside the class and it's visible to all methods and other variables as well (if It's public).
A local variable is declared inside a method (and consider that method can be outside the class you aim). This variable is only used by that method and only when the method is called

Answer 3

ex:
public static class Class1{
public static void print10( ){
private int value = 10;
System.out.println(value);
}

public class Class2{
public static void main(String [ ] args){
int otherValue = 20;
System.out.println(otherValue);
print10( );
}
}

in this example, you can't use directly or change the value of the variable "value" from the main class, because It's a local variable from the Class1, but you can use or change the value of the variable "otherValue" as well, because it's a class variable of the Class2 (the main class).