# StackTraceElement Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary:[Ctors](https://developer.android.com/reference/java/lang/StackTraceElement#pubctors)\|[Methods](https://developer.android.com/reference/java/lang/StackTraceElement#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/java/lang/StackTraceElement#inhmethods) # StackTraceElement ` public final class StackTraceElement ` ` extends `[Object](https://developer.android.com/reference/java/lang/Object)` `` implements `[Serializable](https://developer.android.com/reference/java/io/Serializable)` ` |---|-----------------------------| | [java.lang.Object](https://developer.android.com/reference/java/lang/Object) || | ↳ | java.lang.StackTraceElement |
*** ** * ** *** An element in a stack trace, as returned by[Throwable.getStackTrace()](https://developer.android.com/reference/java/lang/Throwable#getStackTrace()). Each element represents a single stack frame. All stack frames except for the one at the top of the stack represent a method invocation. The frame at the top of the stack represents the execution point at which the stack trace was generated. Typically, this is the point at which the throwable corresponding to the stack trace was created. ## Summary | ### Public constructors || |----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---| | ` `[StackTraceElement](https://developer.android.com/reference/java/lang/StackTraceElement#StackTraceElement(java.lang.String,%20java.lang.String,%20java.lang.String,%20int))`(`[String](https://developer.android.com/reference/java/lang/String)` declaringClass, `[String](https://developer.android.com/reference/java/lang/String)` methodName, `[String](https://developer.android.com/reference/java/lang/String)` fileName, int lineNumber) ` Creates a stack trace element representing the specified execution point. | | ### Public methods || |-----------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` boolean` | ` `[equals](https://developer.android.com/reference/java/lang/StackTraceElement#equals(java.lang.Object))`(`[Object](https://developer.android.com/reference/java/lang/Object)` obj) ` Returns true if the specified object is another`StackTraceElement`instance representing the same execution point as this instance. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[getClassName](https://developer.android.com/reference/java/lang/StackTraceElement#getClassName())`() ` Returns the fully qualified name of the class containing the execution point represented by this stack trace element. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[getFileName](https://developer.android.com/reference/java/lang/StackTraceElement#getFileName())`() ` Returns the name of the source file containing the execution point represented by this stack trace element. | | ` int` | ` `[getLineNumber](https://developer.android.com/reference/java/lang/StackTraceElement#getLineNumber())`() ` Returns the line number of the source line containing the execution point represented by this stack trace element. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[getMethodName](https://developer.android.com/reference/java/lang/StackTraceElement#getMethodName())`() ` Returns the name of the method containing the execution point represented by this stack trace element. | | ` int` | ` `[hashCode](https://developer.android.com/reference/java/lang/StackTraceElement#hashCode())`() ` Returns a hash code value for this stack trace element. | | ` boolean` | ` `[isNativeMethod](https://developer.android.com/reference/java/lang/StackTraceElement#isNativeMethod())`() ` Returns true if the method containing the execution point represented by this stack trace element is a native method. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[toString](https://developer.android.com/reference/java/lang/StackTraceElement#toString())`() ` Returns a string representation of this stack trace element. | | ### Inherited methods | |-----------------------|---| | From class` `[java.lang.Object](https://developer.android.com/reference/java/lang/Object)` ` |--------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` `[Object](https://developer.android.com/reference/java/lang/Object) | ` `[clone](https://developer.android.com/reference/java/lang/Object#clone())`() ` Creates and returns a copy of this object. | | ` boolean` | ` `[equals](https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object))`(`[Object](https://developer.android.com/reference/java/lang/Object)` obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` `[finalize](https://developer.android.com/reference/java/lang/Object#finalize())`() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final `[Class](https://developer.android.com/reference/java/lang/Class)`` | ` `[getClass](https://developer.android.com/reference/java/lang/Object#getClass())`() ` Returns the runtime class of this`Object`. | | ` int` | ` `[hashCode](https://developer.android.com/reference/java/lang/Object#hashCode())`() ` Returns a hash code value for the object. | | ` final void` | ` `[notify](https://developer.android.com/reference/java/lang/Object#notify())`() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` `[notifyAll](https://developer.android.com/reference/java/lang/Object#notifyAll())`() ` Wakes up all threads that are waiting on this object's monitor. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[toString](https://developer.android.com/reference/java/lang/Object#toString())`() ` Returns a string representation of the object. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait(long,%20int))`(long timeoutMillis, int nanos) ` Causes the current thread to wait until it is awakened, typically by being*notified* or*interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait(long))`(long timeoutMillis) ` Causes the current thread to wait until it is awakened, typically by being*notified* or*interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` `[wait](https://developer.android.com/reference/java/lang/Object#wait())`() ` Causes the current thread to wait until it is awakened, typically by being*notified* or*interrupted*. | || ## Public constructors ### StackTraceElement Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public StackTraceElement (String declaringClass, String methodName, String fileName, int lineNumber) ``` Creates a stack trace element representing the specified execution point.
| Parameters || |------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `declaringClass` | `String`: the fully qualified name of the class containing the execution point represented by the stack trace element
| | `methodName` | `String`: the name of the method containing the execution point represented by the stack trace element
| | `fileName` | `String`: the name of the file containing the execution point represented by the stack trace element, or`null`if this information is unavailable
| | `lineNumber` | `int`: the line number of the source line containing the execution point represented by this stack trace element, or a negative number if this information is unavailable. A value of -2 indicates that the method containing the execution point is a native method
| | Throws || |------------------------------------------------------------------------------------------------|-----------------------------------------| | [NullPointerException](https://developer.android.com/reference/java/lang/NullPointerException) | if`declaringClass`or`methodName`is null | ## Public methods ### equals Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public boolean equals (Object obj) ``` Returns true if the specified object is another`StackTraceElement`instance representing the same execution point as this instance. Two stack trace elements`a`and`b`are equal if and only if: equals(a.getFileName(), b.getFileName()) && a.getLineNumber() == b.getLineNumber()) && equals(a.getClassName(), b.getClassName()) && equals(a.getMethodName(), b.getMethodName()) where`equals`has the semantics of[Objects.equals](https://developer.android.com/reference/java/util/Objects#equals(java.lang.Object,%20java.lang.Object)).

| Parameters || |-------|---------------------------------------------------------------------------| | `obj` | `Object`: the object to be compared with this stack trace element.
| | Returns || |-----------|-----------------------------------------------------------------------------------------------------------------------------------| | `boolean` | true if the specified object is another`StackTraceElement`instance representing the same execution point as this instance.
| ### getClassName Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public String getClassName () ``` Returns the fully qualified name of the class containing the execution point represented by this stack trace element.
| Returns || |--------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------| | [String](https://developer.android.com/reference/java/lang/String) | the fully qualified name of the`Class`containing the execution point represented by this stack trace element.
| ### getFileName Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public String getFileName () ``` Returns the name of the source file containing the execution point represented by this stack trace element. Generally, this corresponds to the`SourceFile`attribute of the relevant`class`file (as per*The Java Virtual Machine Specification*, Section 4.7.7). In some systems, the name may refer to some source code unit other than a file, such as an entry in source repository.
| Returns || |--------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------| | [String](https://developer.android.com/reference/java/lang/String) | the name of the file containing the execution point represented by this stack trace element, or`null`if this information is unavailable.
| ### getLineNumber Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public int getLineNumber () ``` Returns the line number of the source line containing the execution point represented by this stack trace element. Generally, this is derived from the`LineNumberTable`attribute of the relevant`class`file (as per*The Java Virtual Machine Specification*, Section 4.7.8).
| Returns || |-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `int` | the line number of the source line containing the execution point represented by this stack trace element, or a negative number if this information is unavailable.
| ### getMethodName Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public String getMethodName () ``` Returns the name of the method containing the execution point represented by this stack trace element. If the execution point is contained in an instance or class initializer, this method will return the appropriate*special method name* ,``or``, as per Section 3.9 of*The Java Virtual Machine Specification*.
| Returns || |--------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------| | [String](https://developer.android.com/reference/java/lang/String) | the name of the method containing the execution point represented by this stack trace element.
| ### hashCode Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public int hashCode () ``` Returns a hash code value for this stack trace element.
| Returns || |-------|-------------------------------------------| | `int` | a hash code value for this object.
| ### isNativeMethod Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public boolean isNativeMethod () ``` Returns true if the method containing the execution point represented by this stack trace element is a native method.
| Returns || |-----------|-----------------------------------------------------------------------------------------------------------------------| | `boolean` | `true`if the method containing the execution point represented by this stack trace element is a native method.
| ### toString Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public String toString () ``` Returns a string representation of this stack trace element.
##### API Note: - The format of this string depends on the implementation, but the following examples may be regarded as typical: - `"MyClass.mash(MyClass.java:9)"`- Here,`"MyClass"`is the*fully-qualified name* of the class containing the execution point represented by this stack trace element,`"mash"`is the name of the method containing the execution point,`"MyClass.java"`is the source file containing the execution point, and`"9"`is the line number of the source line containing the execution point. - `"MyClass.mash(MyClass.java)"`- As above, but the line number is unavailable. - `"MyClass.mash(Unknown Source)"`- As above, but neither the file name nor the line number are available. - `"MyClass.mash(Native Method)"`- As above, but neither the file name nor the line number are available, and the method containing the execution point is known to be a native method. The`toString`method may return two different values on two`StackTraceElement`instances that are[equal](https://developer.android.com/reference/java/lang/StackTraceElement#equals(java.lang.Object)), for example one created via the constructor, and one obtained from[Throwable](https://developer.android.com/reference/java/lang/Throwable)or[StackWalker.StackFrame](https://developer.android.com/reference/java/lang/StackWalker.StackFrame), where an implementation may choose to omit some element in the returned string. | Returns || |--------------------------------------------------------------------|-----------------------------------------------| | [String](https://developer.android.com/reference/java/lang/String) | a string representation of the object.
| **See also:** - [Throwable.printStackTrace()](https://developer.android.com/reference/java/lang/Throwable#printStackTrace())