第一次作业
..........\.classpath
..........\.project
..........\.settings
..........\.........\org.eclipse.jdt.core.prefs
..........\bin
..........\...\第一次作业
..........\...\..........\TestThisShape.class
..........\...\..........\circle.class
..........\...\..........\rectangle.class
..........\...\..........\triangle.class
..........\src
..........\...\第一次作业
..........\...\..........\TestThisShape.java