(Java classic materials are very effective for some people with Java development experience
ch3\BreakContinueTest.java
ch3\BuyTest.java
ch3\DoWhileTest.java
ch3\ForTest.java
ch3\FortuneTest.java
ch3\FortuneTest2.java
ch3\MyIntroduce.java
ch3\OperatorTest.java
ch3\WhileTest.java)