Using java prepared a Tetris game, known to all, no more than introduce

ErsBlocks
.........\build
.........\.....\classes
.........\.....\.......\ersblocks
.........\.....\.......\.........\ControlPanel$1.class
.........\.....\.......\.........\ControlPanel$2.class
.........\.....\.......\.........\ControlPanel$3.class
.........\.....\.......\.........\ControlPanel$4.class
.........\.....\.......\.........\ControlPanel$5.class
.........\.....\.......\.........\ControlPanel$6.class
.........\.....\.......\.........\ControlPanel$7.class
.........\.....\.......\.........\ControlPanel$ControlKeyListener.class
.........\.....\.......\.........\ControlPanel$TipPanel.class
.........\.....\.......\.........\ControlPanel.class
.........\.....\.......\.........\ErsBlock.class
.........\.....\.......\.........\ErsBlocksGames$1.class
.........\.....\.......\.........\ErsBlocksGames$2.class
.........\.....\.......\.........\ErsBlocksGames$3.class
.........\.....\.......\.........\ErsBlocksGames$Game.class
.........\.....\.......\.........\ErsBlocksGames.class
.........\.....\.......\.........\ErsBox.class
.........\.....\.......\.........\GameCanvas.class
.........\build.xml
.........\dist
.........\....\ErsBlocks.jar
.........\....\README.TXT
.........\manifest.mf
.........\nbproject
.........\.........\build-impl.xml
.........\.........\genfiles.properties
.........\.........\private
.........\.........\.......\private.properties
.........\.........\.......\private.xml
.........\.........\project.properties
.........\.........\project.xml
.........\src
.........\...\ersblocks
.........\...\.........\ControlPanel.java
.........\...\.........\ErsBlock.java
.........\...\.........\ErsBlocksGames.java
.........\...\.........\ErsBox.java
.........\...\.........\GameCanvas.java
.........\test

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