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"I'm a circle" network game example, 588-621 IDE, 5 if statement, 34-35 using with else, 36 Image class, 239-240 image formats, 253-254 ImageIO class, 258 images, adding to button, 6-9* adding to check box, 22-23* adding to radio button, 28-33* loading, 253 loading with ImageIO class, 258-261 loading with MediaTracker class, 254-258 setting for buttons, 477-479 immutable objects, 234 implements keyword, 117 implicit casting, 18 import keyword, 124-125 increment operator, 25 index, 54 indexOf method, 74-76 inheritance, 102-103 and access attributes, 108-109 inner class, 92-93 creating, 93-95 input streams, 155 input, getting from user, 155-157 insert method, 83 instance, 9 instanceof keyword, 119-120 instantiation, 10-11 int data type, 16 integer data types, 16-17 conversion, 17-19, 21 integrated development environment, see IDE interface keyword, 116 interface objects, 118 interfaces, 115 defining, 115-117 implementing, 119-120 using, 117-118 interpolation, 250 interrupt method, 193 invocation chaining, 79-80 IP address, 572-573 isInterrupted method, 193-194
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