Java Programming for absolute beginner- P24

Java Programming for absolute beginner- P24:Hello and welcome to Java Programming for the Absolute Beginner. You probablyalready have a good understanding of how to use your computer.These days it’s hard to find someone who doesn’t, given the importanceof computers in today’s world. Learning to control your computer intimatelyis what will separate you from the pack! By reading this book, you learnhow to accomplish just that through the magic of programming.
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Java Programming for absolute beginner- P24 JavaProgAbsBeg-11.qxd 2/25/03 8:57 AM Page 418 418 character at a time using the reader.read() method. If the end of the file (EOF) is reached, this method returns –1. So the while loop checks for this as its con- Java Programming for the Absolute Beginner dition. Although each character read in is not –1, write that character to the writer buffer anyway. Invoking the writer.close() causes the buffer to be cleared, written to the file, and closed. Figure 11.6 shows one run of the FileCopy application. FIGURE 11.6 The FileCopy application copied the file1.txt file and saved the copy as copy.txt. P Don’t forget to call the close() method on the BufferedWriter. If you don’t you TRA won’t get any actual output. There is also a method called flush() which flush- es the buffer and writes it out to the file, but calling close() actually flushes the buffer before closing anyway. Keeping Score The ScoreInfoPanel class keeps score basically by keeping track of three integers: scoreValue keeps track of the current score, hiValue keeps track of the high score, and nLinesValue keeps track of the number of lines cleared. The ScoreInfoPanel class also provides methods for modifying these values such as setScore(int), setHiScore(int), and setLines(int) for setting these values to the given int value. It also provides addToScore(int) and addToLines(int) TEAM LinG - Live, Informative, Non-cost and Genuine!Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. JavaProgAbsBeg-11.qxd 2/25/03 8:57 AM Page 419 419 methods for adding the given int value to these values. Here is the source code for ScoreInfoPanel.java: Chapter 11 /* * ScoreInfoPanel * A Panel that shows the scoring info for a BlockGame * and shows the next block. */ import java.awt.*; Custom Event Handling and File I/O import java.io.*; import java.text.NumberFormat; public class ScoreInfoPanel extends Panel { protected Label scoreLabel = new Label(Score: ), linesLabel = new Label(Lines: ), score = new Label(), hiLabel = new Label(), lines = new Label(), nextLabel = new Label(Next Block, Label.CENTER); protected int scoreValue = 0, hiValue = 0, nLinesValue = 0; protected BlockGrid nextBlockDisplay = new BlockGrid(6, 6, 10); public static int BLOCK = 1, ROW1 = 100, ROW2 = 300, ROW3 = 600, ROW4 = 1000, ROW4BONUS = 10000; protected Label[] points = { new Label(Block = + BLOCK + points), new Label(1 Row = + ROW1 + points), new Label(2 Rows = + ROW2 + points), new Label(3 Rows = + ROW3 + points), new Label(4 Rows = + ROW4 + points), new Label(BONUS = + ROW4BONUS + points) }; NumberFormat nf = NumberFormat.getInstance(); Block block = null; public ScoreInfoPanel() { ...