标题: System类中出现了两个getProperty方法，这是怎么回事？ [打印本页] 作者: 马雨铎 时间: 2011-7-27 22:26 标题: System类中出现了两个getProperty方法，这是怎么回事？ public final class java.lang.System extends java.lang.Object
{
public static PrintStream err;
public static InputStream in;
public static PrintStream out;
public static void arraycopy(Object src,int src_position,
Object dst,int dst_position,int length);
public static long currentTimeMillis();
public static void exit(int status);
public static void gc();
public static Properties getProperties();
public static String getProperty(String key);
public static String getProperty(String key,String def);
public static SecurityManager getSecurityManager();
public static void load(String filename);
public static void loadLibrary(String libname);
public static void runFinalization();
public static void setProperties(Properties props);
public static void setSecurityManager(SecurityManager s);
}
System类中出现了两个getProperty方法，这是怎么回事？