用java实现的枚举类型和实现长方形的程序！在机子上编绎并且通过！！很实用！-with java realized enumeration type and procedures to achieve a rectangular! On the loom series unravel through! ! Very practical!

用java实现的两个测试程序！在机子上编绎并且通过！！很实用！-with java realization of the two test procedures. On the loom series unravel through! ! Very practical!