????1).???????畏??????????3????
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????public
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????2).?????????????????????????????????????????????6????
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????interface
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????abstract
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????new
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????3).???????????2????
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????import
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?????????????????些???????????????????ctrl+shift+o????????????????????????????ctrl+??????????????????????????纾篔Frame??????????????
????importjavax.swing.JFrame;
????package
???????????????
???????????泄??????????????????????????纾簆ackagejavake.flycat.draw002;
????4).????????????????12????
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????16bit
????boolean
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????32bit
????float
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????64bit
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