java的书上例子

				#BlueJ package file
				package.editor.height=300
				package.editor.width=420
				package.editor.x=36
				package.editor.y=36
				package.numDependencies=0
				package.numTargets=1
				target1.height=50
				target1.modifiers=0
				target1.name=a
				target1.type=ClassTarget
				target1.width=80
				target1.x=60
				target1.y=10