LocalVariable (Java SE 26 & JDK 26)
Description: declaration: module: jdk.jdi, package: com.sun.jdi, interface: LocalVariable
Keywords: com.sun.jdi.LocalVariable interface

# Interface LocalVariable

All Superinterfaces:
  `Comparable<LocalVariable>, Mirror`

public interface LocalVariable extends Mirror, Comparable<LocalVariable>
A local variable in the target VM. Each variable declared within a `Method` has its own LocalVariable object. Variables of the same name declared in different scopes have different LocalVariable objects. LocalVariables can be used alone to retrieve static information about their declaration, or can be used in conjunction with a `StackFrame` to set and get values.

Since:
  1.3
See Also:
  - `StackFrame`
  - `Method`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `equals(Object obj)`
  Compares the specified Object with this LocalVariable for equality.
  `String`
  `genericSignature()`
  Gets the generic signature for this variable if there is one.
  `int`
  `hashCode()`
  Returns the hash code value for this LocalVariable.
  `boolean`
  `isArgument()`
  Determines if this variable is an argument to its method.
  `boolean`
  `isVisible(StackFrame frame)`
  Determines whether this variable can be accessed from the given `StackFrame`.
  `String`
  `name()`
  Gets the name of the local variable.
  `String`
  `signature()`
  Gets the type signature of the local variable.
  `Type`
  `type()`
  Returns the type of this variable.
  `String`
  `typeName()`
  Returns a text representation of the type of this variable.

  ### Methods declared in interface Comparable

  `compareTo`
  Modifier and Type
  Method
  Description
  `int`
  `compareTo(LocalVariable o)`
  Compares this object with the specified object for order.

  ### Methods declared in interface Mirror

  `toString, virtualMachine`
  Modifier and Type
  Method
  Description
  `String`
  `toString()`
  Returns a String describing this mirror
  `VirtualMachine`
  `virtualMachine()`
  Gets the VirtualMachine to which this Mirror belongs.

- ## Method Details

  - ### name

    String name()
    Gets the name of the local variable.
    Returns:
      a string containing the name.

  - ### typeName

    String typeName()
    Returns a text representation of the type of this variable. Where the type is the type specified in the declaration of this local variable.

    This type name is always available even if the type has not yet been created or loaded.

    Returns:
      a String representing the type of this local variable.

  - ### type

    Type type() throws ClassNotLoadedException
    Returns the type of this variable. Where the type is the type specified in the declaration of this local variable.

    Note: if the type of this variable is a reference type (class, interface, or array) and it has not been created or loaded by the class loader of the enclosing class, then ClassNotLoadedException will be thrown. Also, a reference type may have been loaded but not yet prepared, in which case the type will be returned but attempts to perform some operations on the returned type (e.g. `fields()`) will throw a `ClassNotPreparedException`. Use `ReferenceType.isPrepared()` to determine if a reference type is prepared.

    Returns:
      the `Type` of this local variable.
    Throws:
      `ClassNotLoadedException` - if the type has not yet been loaded through the appropriate class loader.
    See Also:
      - `Type`
      - Field.type() - for usage examples

  - ### signature

    String signature()
    Gets the type signature of the local variable.
    Returns:
      a string containing the signature.

  - ### genericSignature

    String genericSignature()
    Gets the generic signature for this variable if there is one. Generic signatures are described in the The Java Virtual Machine Specification.
    Returns:
      a string containing the generic signature, or `null` if there is no generic signature.
    Since:
      1.5

  - ### isVisible

    boolean isVisible(StackFrame frame)
    Determines whether this variable can be accessed from the given `StackFrame`. See `StackFrame.visibleVariables()` for a complete description variable visibility in this interface.
    Parameters:
      `frame` - the StackFrame querying visibility
    Returns:
      `true` if this variable is visible; `false` otherwise.
    Throws:
      `IllegalArgumentException` - if the stack frame's method does not match this variable's method.

  - ### isArgument

    boolean isArgument()
    Determines if this variable is an argument to its method.
    Returns:
      `true` if this variable is an argument; `false` otherwise.

  - ### equals

    boolean equals(Object obj)
    Compares the specified Object with this LocalVariable for equality.
    Overrides:
      `equals` in class `Object`
    Parameters:
      `obj` - the reference object with which to compare.
    Returns:
      true if the Object is a LocalVariable, if both LocalVariables are contained in the same method (as determined by `Method.equals(Object)`), and if both LocalVariables mirror the same declaration within that method
    See Also:
      - `Object.hashCode()`
      - `HashMap`

  - ### hashCode

    int hashCode()
    Returns the hash code value for this LocalVariable.
    Overrides:
      `hashCode` in class `Object`
    Returns:
      the integer hash code
    See Also:
      - `Object.equals(java.lang.Object)`
      - `System.identityHashCode(Object)`