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Java Throwable getStackTrace() Method with Example

Throwable Class getStackTrace() method: Here, we are going to learn about the getStackTrace() method of Throwable Class with its syntax and example.
Submitted by Preeti Jain, on January 06, 2020

Throwable Class getStackTrace() method

• getStackTrace() Method is available in java.lang package.
• getStackTrace() Method is used to return an array of StackTraceElement and every element in an array denotes one stack frame.
• As we know that the first element of the array denotes the top of the stack and the last element of the array denotes bottom of the stack (i.e. In a sequence the last method called to represent the top of the stack and in a sequence the first method called represents the bottom of the stack).
• getStackTrace() Method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• getStackTrace() Method does not throw an exception at the time of maintaining method calls onto a stack.

Syntax:

    public StackTraceElement[] getStackTrace();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is StackTraceElement[], it returns an array of stack trace elements denoting the tracing of method calls onto a stack.

Example:

// Java program to demonstrate the example 
// of StackTraceElement method of Throwable 

public class GetStackTrace {
    public static void main(String args[]) {
        try {
            stackTraceMethod();
        } catch (Throwable ex) {

            // By using getStackTrace() method is to get the
            // stack trace element
            StackTraceElement[] st_tr = ex.getStackTrace();
            System.err.println("st_tr[0].toString()" + st_tr[0].toString());
        }

    }

    public static void stackTraceMethod() throws Throwable {
        int li_nu = 7;
        // instantiate a new exception called 
        // Throwable
        Throwable th = new Throwable("Raise New Exception");
        StackTraceElement[] st_tr = new StackTraceElement[] {
            new StackTraceElement("cl_na", "me_na", "fu_na", li_nu)
        };

        // By using setStackTrace() method is to set
        // the elements in stack
        th.setStackTrace(st_tr);
        throw th;

    }
}

Output

st_tr[0].toString()cl_na.me_na(fu_na:7)