Understand the effects of public and private access : Access Control « Class Definition « Java Tutorial

class Test {
  int a; // default access

  public int b; // public access

  private int c; // private access

  void setc(int i) {
    c = i;

  int getc() { 
    return c;

class AccessTest {
  public static void main(String args[]) {
    Test ob = new Test();
    ob.a = 10;
    ob.b = 20;

    System.out.println("a, b, and c: " + ob.a + " " + ob.b + " " + ob.getc());

5.25.Access Control
5.25.1.Access Control: four access control modifiers
5.25.2.Class Access Control Modifiers
5.25.3.Using Access Attributes
5.25.4.Class Member Access Matrix
5.25.5.Specifying Access Attributes
5.25.6.The public Book class
5.25.7.Default access level
5.25.8.Class Member Access Control Modifiers
5.25.9.Composition with public objects
5.25.10.The protected keyword
5.25.11.Private Override
5.25.12.Understand the effects of public and private access
5.25.13.In a class hierarchy, private members remain private to their class.
5.25.14.A Superclass Variable Can Reference a Subclass Object
5.25.15.Create a Singleton Object