StackTraceElement StackTraceElement(String, String, String, int) in Java

StackTraceElement(String, String, String, int): This method is available in the java.lang.StackTraceElement class of Java.

Syntax:

java.lang.StackTraceElement.StackTraceElement(String declaringClass, String methodName, String fileName, int lineNumber)

This method takes four arguments. This method creates a stack trace element representing the specified execution point. The module name and module version of the stack trace element will be null.

Parameters: Four parameters are required for this method.

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:

1. NullPointerException - if declaringClass or methodName is null.

Approach 1: When no exception

Java

package com.StackTraceElement;

public class StackTraceElement1 {
    public static void main(String[] args) {

        String declaringClass = "java.lang.String";
        String methodName = "length()";
        String fileName = "String.class";
        int lineNumber = 675;
        StackTraceElement stackTraceElement = new 
             StackTraceElement(declaringClass, 
                     methodName, fileName, lineNumber);

        System.out.println(stackTraceElement);
    }
}

Output:

java.lang.String.length()(String.class:675)

Approach 2: NullPointerException

Java

package com.StackTraceElement;

public class StackTraceElement1 {
    public static void main(String[] args) {

        String declaringClass = "java.lang.String";
        String methodName = null;
        String fileName = "String.class";
        int lineNumber = 675;
        StackTraceElement stackTraceElement = 
           new StackTraceElement(declaringClass, 
                   methodName, fileName, lineNumber);

        System.out.println(stackTraceElement);
    }
}

Output:

Exception in thread "main" java.lang.NullPointerException: Method name is null
	at java.base/java.util.Objects.requireNonNull(Objects.java:233)
	at java.base/java.lang.StackTraceElement.<init>(StackTraceElement.java:141)
	at java.base/java.lang.StackTraceElement.<init>(StackTraceElement.java:98)
	at com.StackTraceElement.StackTraceElement1.main(StackTraceElement1.java:10)

Some other methods of StackTraceElement

StackTraceElement(String, String, String, int): This method creates a stack trace element representing the specified execution point. The module name and module version of the stack trace element will be null.

StackTraceElement(String, String, String, String, String, String, int): This method creates a stack trace element representing the specified execution point.

equals(Object): This method returns true if the specified object is another StackTraceElement instance representing the same execution point as this instance.

getClassLoaderName(): This method returns the name of the class loader of the class containing the execution point represented by this stack trace element.

getClassName(): This method returns the fully qualified name of the class containing the execution point represented by this stack trace element.

getFileName(): This method returns the name of the source file containing the execution point represented by this stack trace element.

getLineNumber(): This method returns the line number of the source line containing the execution point represented by this stack trace element.

getMethodName(): This method returns the name of the method containing the execution point represented by this stack trace element.

getModuleName(): This method returns the module name of the module containing the execution point represented by this stack trace element.

getModuleVersion(): This method returns the module version of the module containing the execution point represented by this stack trace element.

hashCode(): This method returns a hash code value for this stack trace element.

isNativeMethod(): This method returns true if the method containing the execution point represented by this stack trace element is a native method.

toString(): This method returns a string representation of this stack trace element.