Sams Teach Yourself C in 21 Days

9: System.out.println(“The circle’s radius is “ 10: + Double.toString(c1.radius)); 11: } 12: } The circle’s radius is 1.25 The f ...

Working with Java Classes and Methods 735 BD5 LISTINGB5.9 circle2.java. A class with an overloaded constructor 1: import java.la ...

22: System.out.println(“ The name is “ + c3.name); 23: } 24: } For c1: The radius is 0.0 The name is Unnamed For c2: The radius ...

Working with Java Classes and Methods 737 BD5 totally new class containing all the needed features? Not with inheritance you don ...

21: public double total() { 22: return itotal; 23: } 24: } Lines 3 and 4 declare two variables to hold the class’s properties. N ...

Working with Java Classes and Methods 739 BD5 Line 1 opens the class definition. By using the extendskeyword with the name of th ...

From class ListOfNumbers: Total = 21.6 Count = 3 From class BetterListOfNumbers: Total = 21.6 Count = 3 Average = 7.2 Line 5 dec ...

Working with Java Classes and Methods 741 BD5 AAlthough overloaded methods do have the same name, they must differ in the num- b ...

40 448201x-Bonus5 8/13/02 11:23 AM Page 742 ...

BONUS DAY 6 BONUS WEEK More Java Techniques Java is a full-featured and powerful language. You learned the most important basics ...

In Java, an error is referred to as an exception. When an error occurs, the program is throwing an exception. Different errors c ...

More Java Techniques 745 BD6 Java exceptions are a complex topic. You will see some details of how they are used in the section ...

14: System.out.println(s); 15: } 16: buff.close(); 17: } 18: catch (IOException e) { 19: System.out.println(“An error occurred: ...

More Java Techniques 747 BD6 Writing Text Files ................................................................................ ...

26: } 27: catch (IOException e) { 28: System.out.println(“Error: “ + e.toString()); 29: fileError = true; 30: } 31: if (!fileErr ...

More Java Techniques 749 BD6 Finally, lines 31 to 35 display one of two farewell messages depending on whether the fileErrorflag ...

12: 13: public static void main(String args[]) { 14: AWT_Test1 Test = new AWT_Test1(“A Java Window”); 15: Test.resize(350,250); ...

More Java Techniques 751 BD6 Drawing Shapes and Lines .......................................................................... ...

9: drawShapes(); 10: add(“Center”, new MyCanvas()); 11: } 12: public static void main(String args[]) { 13: DrawingTest app = new ...

More Java Techniques 753 BD6 Lines 12 to 15 are the mainmethod that is executed when the program is run. Code here is quite simp ...