By Stuart Reges
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Extra resources for Building Java Programs: A Back to Basics Approach, 2nd Edition
Println("+------+"); 12 13 } } The program works correctly, but the four lines used to draw the box appear twice. This redundancy is undesirable for several reasons. For example, you might wish to change the appearance of the boxes, in which case you’ll have to make all of the edits twice. Also, you might wish to draw additional boxes, which would require you to type additional copies of (or copy and paste) the redundant lines. 32 Chapter 1 Introduction to Java Programming A preferable program would include a Java command that specifies how to draw the box and then executes that command twice.
This is another programming habit that tends to vary according to taste. Some people (including the authors) find it hard to read string literals that contain \n escape sequences, but other people prefer to write fewer lines of code. Once again, you should make up your own mind about when to use the newline escape sequence. 2 And Now—Java print versus println Java has a variation of the println command called print that allows you to produce output on the current line without going to a new line of output.
Statement An executable snippet of code that represents a complete command. Each statement is terminated by a semicolon. "); Notice that this statement ends with a semicolon. The semicolon has a special status in Java; it is used to terminate statements in the same way that periods terminate sentences in English. "); 7 8 13 } } Notice that there are four semicolons in the main method, one at the end of each of the four println statements. The statements are executed in the order in which they appear, from first to last, so the Hello2 program produces the following output: Hello, world!