Advanced Report and Chart Formatting in Java

Generate QR in Java Advanced Report and Chart Formatting

36. For Colorado customers, compute the number of orders placed in January 2007 in which the or ders contain products made by Connex. The result should include the customer number, last name, and number of orders placed in January 2007. 37. For each employee with a commission rate of less than 0.04, compute the number of orders taken in January 2007. The result should include the employee number, employee last name, and num ber of orders taken. 38. For each employee with a commission rate greater than 0.03, compute the total commission earned from orders taken in January 2007. The total commission earned is the total order amount times the commission rate. The result should include the employee number, employee last name, and total commission earned. 39. List the total amount of all orders by month in 2007. The result should include the month and the total amount of all orders in each month. The total amount of an individual order is the sum of the quantity times the product price of each product in the order. In Access, the month number can be extracted by the Month function with a date as the argument. You can display the month name using the MonthName function applied to a month number. In Oracle, the function to_char(OrdDate, 'M') extracts the month number from OrdDate. Using "MON" instead of "M" extracts the three-digit month abbreviation instead of the month number. 40. List the total commission earned by each employee in each month of 2007. The result should include the month, employee number, employee last name, and the total commission amount earned in that month. The amount of a commission for an individual employee is the sum of the dollar amount of products ordered times the commission rate of the employee. Sort the re sult by the month in ascending month number and the total commission amount in descending order. In Access, the month number can be extracted by the Month function with a date as the argument. You can display the month name using the MonthName function applied to a month number. In Oracle, the function to_char(OrdDate, 'M') extracts the month number from OrdDate. Using "MON" instead of "M" extracts the three-digit month abbreviation instead of the month number.

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TIP Remember that when allowing non-IP traffic, you ll need to apply an ACL (or ACLs) to both interfaces in order to allow traffic in both directions.

Figure 9-18

Up to this point, we have been catching exceptions, but we haven t been doing anything with the exception object itself. As explained earlier, a catch clause allows you to specify an exception type and a variable. The variable receives a reference to the exception object. Since all exceptions are derived from Exception, all exceptions support the members defined by Exception. Here we will examine several of its most useful members and constructors, and put the exception variable to use. Exception defines several properties. Three of the most interesting are Message, StackTrace, and TargetSite. All are read-only. Message contains a string that describes the nature of the error. StackTrace contains a string that contains the stack of calls that lead to the exception. TargetSite obtains an object that specifies the method that generated the exception. Exception also defines several methods. One that you will often use is ToString( ), which returns a string that describes the exception. ToString( ) is automatically called when an exception is displayed via WriteLine( ), for example. The following program demonstrates these properties and this method:

Classify reactions as single-replacement chemical reactions. Use numbers to write balanced equations for single-replacement reactions. Sequence metals into an activity series.

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WAVELENGTH COSMIC RAYS (METERS)

Although anonymous methods are still part of C#, they have been largely superceded by a better approach: the lambda expression. It is not an overstatement to say that the lambda expression is one of the most important features added to C# since its original 1.0 release. Based on a distinctive syntactic element, the lambda expression provides a powerful alternative to the anonymous method. Although a principal use of lambda expressions is found when working with LINQ (see 19), they are also applicable to (and commonly used with) delegates and events. This use of lambda expressions is described here. A lambda expression is the second way that an anonymous function can be created. (The other type of anonymous function is the anonymous method, described in the preceding section.) Thus, a lambda expression can be assigned to a delegate. Because a lambda expression is more streamlined than the equivalent anonymous method, lambda expressions are now the recommended approach in almost all cases.

I cut the entire last sentence. I didn t need it. The more I kept my focus on my objective, the better my writing got. Notice how Stuart eliminated repetitive words and phrases, aligned construction to ensure a parallel structure, and simpli ed the content. What do you think Is it clearer Certainly it s shorter. What s your view Is it more reader friendly Is it more usable by Stuart s boss at a town meeting Most people agree that it is better. Stuart applied the principles we ve discussed in a methodical manner, and his writing improved. Plus, he explained, I learned to write keeping parallel construction and avoiding redundancy in mind. By writing cleaner communications in the rst place, I speeded up the entire process.