Changing default Google App Engine port from 8080

For those who have installed Tomcat or any other server which runs on 8080, starting GAE server will give some error like this
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Sep 3, 2009 5:25:18 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed SelectChannelConnector@127.0.0.1:8080
java.net.BindException: Address already in use: bind
at sun.nio.ch.Net.bind(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:211)
at org.mortbay.jetty.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:309)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
at org.mortbay.jetty.Server.doStart(Server.java:228)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:152)
at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:116)
at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:218)
at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:162)
at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
at com.google.appengine.tools.development.DevAppServerMain.(DevAppServerMain.java:113)
at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:89)
Sep 3, 2009 5:25:18 AM com.google.apphosting.utils.jetty.JettyLogger warn
WARNING: failed Server@1a7ddcf
java.net.BindException: Address already in use: bind
at sun.nio.ch.Net.bind(Native Method)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:211)
at org.mortbay.jetty.nio.SelectChannelConnector.doStart(SelectChannelConnector.java:309)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
at org.mortbay.jetty.Server.doStart(Server.java:228)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:40)
at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:152)
at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:116)
at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:218)
at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:162)
at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48)
at com.google.appengine.tools.development.DevAppServerMain.(DevAppServerMain.java:113)
at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:89)

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Could not open the requested socket: Address already in use: bind
Try overriding –address and/or –port.
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To resolve go to %SDK_HOME%\config\user and update ant-macros.html line 23
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Foe Eclipse users this file is located in

%ECLIPSE_HOME\plugins\com.google.appengine.eclipse.sdkbundle_1.2.2.v200907291526\
appengine-java-sdk-1.2.2\config\user if using SDK 1.2.2

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