Có 25+ tài liệu thuộc chủ đề "thủ thuật lập trình java"
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As you learned in Section 11.4, you typically must specify the layout of the GUI components in a JFrame . Section 11.17.2 discusses BorderLayout in more detail.. 11.14. Figure 11.30 shows several java.awt.event adapter classes and the. Figure 11.30. java.awt.event. 11.31 and Fig. 11.32 demonstrates how to determine the number of mouse clicks (i.e., the click count) and how to...
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11.1 Fill in the blanks in each of the following statements:. 11.4 Fill in the blanks in each of the following statements:. The status bar will display the coordinates of the current mouse position.. Also, update the JLabel in mouseDragged with the current position of the mouse.. 12.1 Introduction. 12.2 Graphics Contexts and Graphics Objects 12.3 Color Control. 12.5 Drawing...
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Figure 12.25. 12.25: DrawArcs.java 2. 12.26. 12.27Fig. Figure 12.26. Figure 12.27. 12.27: PolygonsJPanel.java 2. 3 import java.awt.Graphics. 4 import java.awt.Polygon. 3 import java.awt.Graphics;. 4 import java.awt.Polygon;. Figure 12.28. 12.28: DrawPolygons.java 2. Graphics2D is an abstract subclass of class Graphics , so it has all the graphics capabilities. 12.29Fig. Figure 12.29. 12.29: ShapesJPanel.java 2. 3 import java.awt.Color;. 4 import java.awt.Graphics;. 5...
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13.2), the try block terminates immediately and program control transfers to the first of the following catch blocks in which the exception parameter's type matches the type of the thrown exception. 13.2, the first catch block catches InputMismatchExceptions (which occur if invalid input is entered) and the second catch block catches ArithmeticExceptions (which occur if an attempt is made to...
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Figure 14.1 illustrates a portion of the data hierarchy.. Figure 14.3 lists some common File methods. Returns a string with the absolute path of the file or directory.. String getName() Returns a string with the name of the file or directory.. If the File object represents a directory, 0 is returned.. identifies the file data.txt stored in the home directory...