package ddd;
class GetProps {
public static void main(String[] args) {
/* Test reading properties w & w/out security manager */
String s;
try {
System.out.println( "About to get os.name property value ");
s = System.getProperty( "os.name ", "not specified ");
System.out.println( " The name of your operating system is: " + s);
System.out.println( "About to get java.version property value ");
s = System.getProperty( "java.version ", "not specified ");
System.out.println( " The version of the JVM you are running is: " + s);
System.out.println( "About to get user.home property value ");
s = System.getProperty( "user.home ", "not specified ");
System.out.println( " Your user home directory is: " + s);
System.out.println( "About to get java.home property value ");
s = System.getProperty( "java.home ", "not specified ");
System.out.println( " Your JRE installation directory is: " + s);
} catch (Exception e) {
System.err.println( "Caught exception " + e.toString());
}
}
}
代码编译后所在位置C:\aaa\ddd
java -Djava.security.manager ddd.GetProps