If you have a use case where you want your application to terminate with an exception but rather want to catch the exception and print the stack trace as a String, below is an example to demonstrate it.
package org.code2care.java.sorting.algo;
import java.io.PrintWriter;
import java.io.StringWriter;
public class ExceptionAsString {
public static void main(String[] args) {
try {
String string = null;
string.toString(); //Throws NPE
} catch (NullPointerException exception) {
StringWriter stringWriter = new StringWriter();
exception.printStackTrace(new PrintWriter(stringWriter));
String stackTrace = stringWriter.toString();
System.out.println(stackTrace);
}
}
}
java.lang.NullPointerException:
Cannot invoke "String.toString()" because "string" is null
at org.code2care.java.ExceptionAsString.main(ExceptionAsString.java:10)
Process finished with exit code 0
As you can see the exception was printed as a string and the program completed with an exit code of 0
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Author Info:
Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.
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