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Noncompliant Code Example (Public Class)

In this This noncompliant code example concerns a class that is internal to a system, and not part of any public API. Nonetheless, the class Point is declared public. Even though this example complies with rule OBJ01-J. Declare data members as private and provide accessible wrapper methods, untrusted code could instantiate Point and invoke the public getPoint() to obtain the coordinates.

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This compliant solution declares the Point class as package-private, in accordance with its status as not part of any public API.

final class Point {
  private final int x;
  private final int y;

  Point(int x, int y) {
    this.x = x;
    this.y = y; 
  }
	
  public void getPoint() { 
    System.out.println("(" + x + "," + y + ")");  
  }	
}

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Noncompliant Code Example (Public Class With Public Static Method)

Again, this noncompliant code example concerns a class that is internal to a system, and not part of any public API. Nonetheless, the class Point is declared public. Even though this example complies with rule OBJ01-J. Declare data members as private and provide accessible wrapper methods, untrusted code could instantiate Point and invoke the public getPoint() to obtain the coordinates.

This noncompliant code example shows a public Point class that attempts to implement instance control using a private constructor. However, untrusted code may invoke the public static getPoint() method without instantiating the class because the class is public.

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