Description: System class on behalf of the system, many of the system-level attributes and control methods are placed in the class of internal. Class Bit This java.lang package. Because the constructor of this class is private, you can not create an object of that class, that is, you can not instantiate the class. Its internal member variables and member methods are static, so it can be very convenient to call.
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day14_System
............\.classpath
............\.project
............\.settings
............\.........\org.eclipse.jdt.core.prefs
............\bin
............\...\cn
............\...\..\itcast_01
............\...\..\.........\Person.class
............\...\..\.........\SystemDemo.class
............\...\..\itcast_02
............\...\..\.........\SystemDemo.class
............\...\..\itcast_03
............\...\..\.........\SystemDemo.class
............\src
............\...\cn
............\...\..\itcast_01
............\...\..\.........\Person.java
............\...\..\.........\SystemDemo.java
............\...\..\itcast_02
............\...\..\.........\SystemDemo.java
............\...\..\itcast_03
............\...\..\.........\SystemDemo.java
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