Mirror
ArrayReference
, BooleanValue
, ByteValue
, CharValue
, ClassLoaderReference
, ClassObjectReference
, DoubleValue
, FloatValue
, IntegerValue
, LongValue
, ModuleReference
, ObjectReference
, PrimitiveValue
, ShortValue
, StringReference
, ThreadGroupReference
, ThreadReference
, VoidValue
public interface Value extends Mirror
Some examples of where values may be accessed:
ObjectReference.getValue(Field)
- value of a field StackFrame.getValue(LocalVariable)
- value of a variable VirtualMachine.mirrorOf(double)
- created in the target VM by the JDI client ModificationWatchpointEvent.valueToBe()
- returned with an event
The following tables illustrate which subinterfaces of Value are used to mirror values in the target VM --
Kind of value | For example - expression in target | Is mirrored as an instance of |
Type of valueValue.type()
|
---|---|---|---|
a boolean | true | BooleanValue | BooleanType |
a byte | (byte)4 | ByteValue | ByteType |
a char | 'a' | CharValue | CharType |
a double | 3.1415926 | DoubleValue | DoubleType |
a float | 2.5f | FloatValue | FloatType |
an int | 22 | IntegerValue | IntegerType |
a long | 1024L | LongValue | LongType |
a short | (short)12 | ShortValue | ShortType |
a void | VoidValue | VoidType |
Kind of value | For example - expression in target | Is mirrored as an instance of |
Type of valueValue.type()
|
---|---|---|---|
a class instance | this | ObjectReference | ClassType |
an array | new int[5] | ArrayReference | ArrayType |
a string | "hello" | StringReference | ClassType |
a thread | Thread.currentThread() | ThreadReference | ClassType |
a thread group |
Thread.currentThread() .getThreadGroup()
| ThreadGroupReference | ClassType |
a java.lang.Class instance | this.getClass() | ClassObjectReference | ClassType |
a class loader |
this.getClass() .getClassLoader()
| ClassLoaderReference | ClassType |
Kind of value | For example - expression in target | Is mirrored as |
Type of value |
---|---|---|---|
null | null | null | n/a |
toString, virtualMachine
Type type()
Type
which mirrors the value's type in the target VM.
© 1993, 2023, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.
https://docs.oracle.com/en/java/javase/21/docs/api/jdk.jdi/com/sun/jdi/Value.html