Caculate
........\.classpath
........\.fatjar
........\.project
........\.settings
........\.........\org.eclipse.jdt.core.prefs
........\bin
........\...\CalFrame$1.class
........\...\CalFrame.class
........\...\CalService.class
........\...\Main.class
........\...\MyMath.class
........\Caculate_fat.jar
........\src
........\...\CalFrame.java
........\...\CalService.java
........\...\Main.java
........\...\MyMath.java