7.java

/* This program demonstrates the difference between
   public and private.
*/
class Test {
  int a; // default access
  public int b; // public access
  private int c; // private access

  // methods to access c
  void setc(int i) { // set c's value
      c = i;
  }
  int getc() { // get c's value
      return c;
  }
}

class AccessTest {
  public static void main(String args[]) {
      Test ob = new Test();

      // These are OK, a and b may be accessed directly
      ob.a = 10;
      ob.b = 20;

      // This is not OK and will cause an error
      //  ob.c = 100; // Error!

      // You must access c through its methods
      ob.setc(100); // OK
  
      System.out.println("a, b, and c: " + ob.a + " " +
                      ob.b + " " + ob.getc());
  }
}