public StackTraceElement(String declaringClass,
    String methodName,
    String fileName,
    int lineNumber) 
{
        if (declaringClass == null)
            throw new NullPointerException("Declaring class is null");
        if (methodName == null)
            throw new NullPointerException("Method name is null");
        this.declaringClass = declaringClass;
        this.methodName     = methodName;
        this.fileName       = fileName;
        this.lineNumber     = lineNumber;
}

Creates a stack trace element representing the specified execution point.

Parameters:

declaringClass - the fully qualified name of the class containing the execution point represented by the stack trace element

methodName - the name of the method containing the execution point represented by the stack trace element

fileName - the name of the file containing the execution point represented by the stack trace element, or null if this information is unavailable

lineNumber - 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 - if declaringClass or methodName is null

since: 1.5 -

 public boolean equals(Object obj) 
{
        if (obj==this)
            return true;
        if (!(obj instanceof StackTraceElement))
            return false;
        StackTraceElement e = (StackTraceElement)obj;
        return e.declaringClass.equals(declaringClass) && e.lineNumber == lineNumber
            && eq(methodName, e.methodName) && eq(fileName, e.fileName);
}

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));
}

 public String getClassName() 
{
        return declaringClass;
}

Returns the fully qualified name of the class containing the execution point represented by this stack trace element.

 public String getFileName() 
{
        return fileName;
}

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.

 public int getLineNumber() 
{
        return lineNumber;
}

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).

 public String getMethodName() 
{
        return methodName;
}

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.

 public int hashCode() 
{
        int result = 31*declaringClass.hashCode() + methodName.hashCode();
        result = 31*result + (fileName == null ?   0 : fileName.hashCode());
        result = 31*result + lineNumber;
        return result;
}

Returns a hash code value for this stack trace element.

 public boolean isNativeMethod() 
{
        return lineNumber == -2;
}

Returns true if the method containing the execution point represented by this stack trace element is a native method.

 public String toString() 
{
        return getClassName() + "." + methodName +
            (isNativeMethod() ? "(Native Method)" :
             (fileName != null && lineNumber  >= 0 ?
              "(" + fileName + ":" + lineNumber + ")" :
              (fileName != null ?  "("+fileName+")" : "(Unknown Source)")));
}

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.