public static boolean checkSecurity() {
SecurityManager security = System.getSecurityManager();
if (security != null) {
try {
security.checkPropertyAccess("user.dir");
security.checkPropertyAccess("file.separator");
} catch (SecurityException e) {
System.out.println("SecurityManager restricts session recording.");
return false;
}
}
return true;
}
/**
* Gets the system property indicated by the specified key.
*
* <p>First, if there is a security manager, its <code>checkPropertyAccess</code> method is called
* with the <code>key</code> as its argument.
*
* <p>If there is no current set of system properties, a set of system properties is first created
* and initialized in the same manner as for the <code>getProperties</code> method.
*
* @param key the name of the system property.
* @param def a default value.
* @return the string value of the system property, or the default value if there is no property
* with that key.
* @exception SecurityException if a security manager exists and its <code>checkPropertyAccess
* </code> method doesn't allow access to the specified system property.
* @exception NullPointerException if <code>key</code> is <code>null</code>.
* @exception IllegalArgumentException if <code>key</code> is empty.
* @see #setProperty
* @see java.lang.SecurityManager#checkPropertyAccess(java.lang.String)
* @see java.lang.System#getProperties()
*/
public static String getProperty(String key, String def) {
checkKey(key);
SecurityManager sm = getSecurityManager();
if (sm != null) {
sm.checkPropertyAccess(key);
}
return props.getProperty(key, def);
}