Java print stack trace to string | How to Convert Program example

Using Core Java API to print the stack trace to strings provides an easy and efficient way to convert stack trace to string using StringWriter and PrintWriter.

A printStackTrace() method is used for get information about exception. You don’t need any special method to convert a print stack trace to a string. In the try-catch-finally exceptions block, we did it in a simple way.

Example: Convert and Print stack trace to a string

This program will throw ArithmeticException by dividing 0 by 0.

StringWriter writer = new StringWriter();
PrintWriter printWriter= new PrintWriter(writer);
exception.printStackTrace(printWriter);

Complete code

In code, Calling writer.toString() will provide stack trace in String format.

In the catch block, StringWriter and PrintWriter print any given output to a string. We then print the stack trace using the printStackTrace() method of the exception and write it in the writer.

import java.io.PrintWriter;
import java.io.StringWriter;

public class TryCatchBlock {

    public static void main(String[] args) {

        try {
            int a[] = new int[10];
            a[11] = 30 / 0;
        } catch (Exception e) {
            StringWriter writer = new StringWriter();
            PrintWriter printWriter= new PrintWriter(writer);
            e.printStackTrace(printWriter);
            System.out.println("Exception in String is :: " + writer.toString());
        }
        System.out.println("Remain codes");
    }
}

Output:

We don’t think you need to convert a Stack trace because you can use the simple printStackTrace() method or print direct exception as below code:-

public class TryCatchBlock {

    public static void main(String[] args) {

        try {
            int a[] = new int[10];
            a[11] = 30 / 0;
        } catch (Exception e) {
            // 1st Way
            e.printStackTrace();
            //  2nd way
            System.out.println(e);
        }
        System.out.println("Remain codes");
    }
}

Output:

Do comment if you have any doubts and suggestions on this tutorial.

Note: This example (Project) is developed in IntelliJ IDEA 2018.2.6 (Community Edition)
JRE: 11.0.1
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.14.1
Java version 11
All Java printStackTrace() methdo codes are in Java 11, so it may change on different from Java 9 or 10 or upgraded versions.