7. Using Predefined Classes and Methods

• To use a method, you must know:

  • Name of the class containing the method (like Math)

  • Name of the package containing the class (like java.lang)

  • Name of the method (like pow) and list of parameters

    
        import java.lang.*;     // imports package
        Math.pow( 2, 3 );       // calls power method in class Math
        Math.pow( x, y );       // another call