用java编制的一个拼图游戏，练习应用button，Jtextfield,Jscrool等组建，练习使用 java.io.* javax.swing.* 等包的用法-prepared with a puzzles, exercise Application button, Jtextfield, Jscrool other form, a practice used java.io.* javax.swing .* packages, such as the use of

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java的小练习，练习继承 class method 的调用。- Exercise#2- Car Class * * Write a class named Car that has the following fields: *- yearModel. The yearModel field is an int that holds the car s year model. *- make. The make field references a String objec