Module java.base

Package java.lang.classfile^PREVIEW

Interface Label

public sealed interface Label

Label is a preview API of the Java platform.

Programs can only use Label when preview features are enabled.

Preview features may be removed in a future release, or upgraded to permanent features of the Java platform.

A marker for a position within the instructions of a method body. The association between a label's identity and the position it represents is managed by the entity managing the method body (a CodeModel^PREVIEW or CodeBuilder^PREVIEW), not the label itself; this allows the same label to have a meaning both in an existing method (as managed by a CodeModel^PREVIEW) and in the transformation of that method (as managed by a CodeBuilder^PREVIEW), while corresponding to different positions in each. When traversing the elements of a CodeModel^PREVIEW, Label^PREVIEW markers will be delivered at the position to which they correspond. A label can be bound to the current position within a CodeBuilder^PREVIEW via CodeBuilder.labelBinding(Label)^PREVIEW or ClassFileBuilder.with(ClassFileElement)^PREVIEW.

Since:

22