Tài liệu SPECIAL JAVA SUBJECT part 2

public class AClass {
public int instanceInteger = 0;
public int instanceMethod() {
return instanceInteger;
}

public static int classInteger = 0;
public static int classMethod() {
return classInteger;
}

public static void main(String[] args) {
AClass anInstance = new AClass();
AClass anotherInstance = new AClass();