code for drow optimaization tree to query

DB2Tree
.......\build
.......\.....\classes
.......\.....\.......\db2tree
.......\.....\.......\.......\DBTree.class
.......\.....\.......\.......\DrawingATree.class
.......\.....\.......\.......\FrameTest$1.class
.......\.....\.......\.......\FrameTest.class
.......\.....\.......\.......\Main.class
.......\.....\.......\.......\MyTreeComponent.class
.......\.....\.......\.......\PanelNode.class
.......\.....\.......\.......\PanelNodeEditor.class
.......\.....\.......\.......\PanelNodeRenderer.class
.......\.....\.......\.......\PanelNodeTip.class
.......\.....\.......\.......\StarPanel$1.class
.......\.....\.......\.......\StarPanel$Node.class
.......\.....\.......\.......\StarPanel.class
.......\.....\.......\.......\Tree$1.class
.......\.....\.......\.......\Tree.class
.......\.....\.......\.......\TreeComponent.class
.......\.....\.......\.......\TreeExample.class
.......\.....\.......\dbtree
.......\.....\.......\newpackage
.......\.....\.......\..........\Main.class
.......\build.xml
.......\manifest.mf
.......\nbproject
.......\.........\build-impl.xml
.......\.........\genfiles.properties
.......\.........\private
.......\.........\.......\private.properties
.......\.........\.......\private.xml
.......\.........\project.properties
.......\.........\project.xml
.......\src
.......\...\db2tree
.......\...\.......\DBTree.java
.......\...\.......\DrawingATree.java
.......\...\.......\FrameTest.java
.......\...\.......\Main.java
.......\...\.......\PanelNodeTip.java
.......\...\.......\StarPanel.java
.......\...\.......\Tree.java
.......\...\.......\TreeComponent.java
.......\...\.......\TreeExample.java
.......\...\newpackage
.......\...\..........\Main.java
.......\test

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