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| java.lang.Object
 java.lang.StackTraceElement
| StackTraceElement | | final public class StackTraceElement implements java.io.Serializable(Code) | | An element in a stack trace, as returned by
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.
since:
1.4
author:
Josh Bloch |
| Constructor Summary | |
| public | StackTraceElement(String declaringClass, String methodName, String fileName, int lineNumber)
Creates a stack trace element representing the specified execution
point.
Parameters:
declaringClass - the fully qualified name of the class containingthe execution point represented by the stack trace element
Parameters:
methodName - the name of the method containing the execution pointrepresented by the stack trace element
Parameters:
fileName - the name of the file containing the execution pointrepresented by the stack trace element, or null ifthis information is unavailable
Parameters:
lineNumber - the line number of the source line containing theexecution point represented by this stack trace element, ora negative number if this information is unavailable. |
| Method Summary | |
| public boolean | equals(Object obj)
Returns true if the specified object is another
StackTraceElement instance representing the same execution
point as this instance. | | public String | getClassName()
Returns the fully qualified name of the class containing the
execution point represented by this stack trace element. | | public String | getFileName()
Returns the name of the source file containing the execution point
represented by this stack trace element. | | public int | getLineNumber()
Returns the line number of the source line containing the execution
point represented by this stack trace element. | | public String | getMethodName()
Returns the name of the method containing the execution point
represented by this stack trace element. | | public int | hashCode()
Returns a hash code value for this stack trace element. | | public boolean | isNativeMethod()
Returns true if the method containing the execution point
represented by this stack trace element is a native method. | | public String | toString()
Returns a string representation of this stack trace element. |
| StackTraceElement | | public StackTraceElement(String declaringClass, String methodName, String fileName, int lineNumber)(Code) | | Creates a stack trace element representing the specified execution
point.
Parameters:
declaringClass - the fully qualified name of the class containingthe execution point represented by the stack trace element
Parameters:
methodName - the name of the method containing the execution pointrepresented by the stack trace element
Parameters:
fileName - the name of the file containing the execution pointrepresented by the stack trace element, or null ifthis information is unavailable
Parameters:
lineNumber - the line number of the source line containing theexecution point represented by this stack trace element, ora negative number if this information is unavailable. A valueof -2 indicates that the method containing the execution pointis a native method
throws:
NullPointerException - if declaringClass ormethodName is null
since:
1.5 |
| equals | | public boolean equals(Object obj)(Code) | | 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 is defined as:
static boolean equals(Object a, Object b) {
return a==b || (a != null && a.equals(b));
}
Parameters:
obj - the object to be compared with this stack trace element. true if the specified object is anotherStackTraceElement instance representing the sameexecution point as this instance. |
| getClassName | | public String getClassName()(Code) | | Returns the fully qualified name of the class containing the
execution point represented by this stack trace element.
the fully qualified name of the Class containingthe execution point represented by this stack trace element. |
| getFileName | | public String getFileName()(Code) | | 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.
the name of the file containing the execution pointrepresented by this stack trace element, or null ifthis information is unavailable. |
| getLineNumber | | public int getLineNumber()(Code) | | 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).
the line number of the source line containing the executionpoint represented by this stack trace element, or a negativenumber if this information is unavailable. |
| getMethodName | | public String getMethodName()(Code) | | 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, <init> or
<clinit>, as per Section 3.9 of The Java Virtual
Machine Specification.
the name of the method containing the execution pointrepresented by this stack trace element. |
| hashCode | | public int hashCode()(Code) | | Returns a hash code value for this stack trace element.
|
| isNativeMethod | | public boolean isNativeMethod()(Code) | | Returns true if the method containing the execution point
represented by this stack trace element is a native method.
true if the method containing the execution pointrepresented by this stack trace element is a native method. |
| toString | | public String toString()(Code) | | Returns a string representation of this stack trace element. 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.
See Also: Throwable.printStackTrace |
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