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

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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:

Java print stack trace to string

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:

Java printStackTrace method

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.

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