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java

A 29-post collection

Page 1 of 6 Older Posts »

Filtering log lines using exception messages in log4j2

Recently I needed to filter out messages logged by a bit too verbose library. This is not too difficult in log4j2 since we can attach filters... »

Author image Marcin Chwedczuk on Java, Jvmbloggers 25 Jan 2021

Useful JDK tools (part 1)

JDK comes with a bunch of handy tools. It’s good to know about them. In this post we will take a look at jps, jstack, jmap... »

Author image Marcin Chwedczuk on Java 10 Jul 2020

Matching regexes using backtracking

In this post we will write a simple regex library. The table below presents regex operators that we are going to support: Operator Description A single... »

Author image Marcin Chwedczuk on Java, Regex 28 Jun 2020

Continuations in Java

CSP or Continuation-Passing Style is a style of programming in which functions return results via callbacks. For example + operator is a function that takes two... »

Author image Marcin Chwedczuk on Java, Functional-programming 27 Jun 2020

Spy JVM network traffic with Owasp ZAP proxy

We start by downloading Owasp ZAP proxy: $ # Download and unpack... $ curl -O -J -L https://github.com/zaproxy/zaproxy/releases/download/2.7.0/ZAP_2.7.0_Linux.tar.gz $ tar xvzf ZAP_2.7.0_Linux.tar.gz $ # Run ZAP... »

Author image Marcin Chwedczuk on Java 24 Jan 2019
Page 1 of 6 Older Posts »
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