--- old/src/share/classes/java/lang/Exception.java 2010-01-07 19:41:31.000000000 -0800 +++ new/src/share/classes/java/lang/Exception.java 2010-01-07 19:41:31.000000000 -0800 @@ -26,19 +26,27 @@ package java.lang; /** - * The class Exception and its subclasses are a form of - * Throwable that indicates conditions that a reasonable + * The class {@code Exception} and its subclasses are a form of + * {@code Throwable} that indicates conditions that a reasonable * application might want to catch. * + *

The class {@code Exception} and any subclasses that are not also + * subclasses of {@link RuntimeException} are checked + * exceptions. Checked exceptions need to be declared in a + * method or constructor's {@code throws} clause if they can be thrown + * by the execution of the method or constructor and propagate outside + * the method or constructor boundary. + * * @author Frank Yellin * @see java.lang.Error + * @jls3 11.2 Compile-Time Checking of Exceptions * @since JDK1.0 */ public class Exception extends Throwable { static final long serialVersionUID = -3387516993124229948L; /** - * Constructs a new exception with null as its detail message. + * Constructs a new exception with {@code null} as its detail message. * The cause is not initialized, and may subsequently be initialized by a * call to {@link #initCause}. */ @@ -61,7 +69,7 @@ /** * Constructs a new exception with the specified detail message and * cause.

Note that the detail message associated with - * cause is not automatically incorporated in + * {@code cause} is not automatically incorporated in * this exception's detail message. * * @param message the detail message (which is saved for later retrieval