Compile with deprecation

[steven_luck1]

Yap, if I'm not mistaken, deprecated methods can be defined as old methods that have been substituted with other methods. For example:
Component.show(); is now declared Component.setVisible(true);

I don't really know, but if I'm not mistaken, it depends on the version of JDK, if u use the older one, u may not find the errors while compiling the program with deprecated methods.

[CornedBee]

Yap, if I'm not mistaken, deprecated methods can be defined as old methods that have been substituted with other methods. For example:
Component.show(); is now declared Component.setVisible(true);

No, this is actually incorrect. Deprecated items, in Java, are those whose use Sun discourages, for whatever reason. For example, there are some methods in Thread that are deprecated without replacement, because they can lead to program corruption when used in special circumstances.

I don't really know, but if I'm not mistaken, it depends on the version of JDK, if u use the older one, u may not find the errors while compiling the program with deprecated methods.

This is correct, because items only become deprecated when Java releases a new version of the JDK. This doesn't mean, however, that it's acceptable to just use an older JDK: the method is still deprecated, it's just that it is not marked as such and the compiler thus doesn't know it.