This a small , the can add, delete, change and other operations.

personDB
........\.classpath
........\.fatjar
........\.project
........\bin
........\...\personDB
........\...\........\Delete.class
........\...\........\Insert$1.class
........\...\........\Insert$2.class
........\...\........\Insert.class
........\...\........\Login$1.class
........\...\........\Login$2.class
........\...\........\Login$3.class
........\...\........\Login.class
........\...\........\NewInfo.class
........\...\........\ShowInfo$1.class
........\...\........\ShowInfo$2.class
........\...\........\ShowInfo$3.class
........\...\........\ShowInfo$4.class
........\...\........\ShowInfo$5.class
........\...\........\ShowInfo.class
........\...\........\Update$1.class
........\...\........\Update$2.class
........\...\........\Update.class
........\db
........\..\db1.ldb
........\..\db1.mdb
........\delete.jpg
........\insert.jpg
........\libs
........\....\substance.jar
........\login.jpg
........\showinfo.jpg
........\src
........\...\personDB
........\...\........\Delete.java
........\...\........\Insert.java
........\...\........\Login.java
........\...\........\NewInfo.java
........\...\........\ShowInfo.java
........\...\........\Update.java
........\update.jpg

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