Java

URL: https://www.progressiverobot.com/java-file-separator-separatorchar-pathseparator-pathseparatorchar/ java.io.File class contains four static separator variables. Here we will learn about them and when to use it. File.separator: Platform dependent default name-separator character as String. For windows, it's '\' and for unix it's '/'. File.separatorChar: Same as separator but it's char. File.pathSeparator: Platform dependent variable for path-separator. For example PATH or CLASSPATH […]

A Guide to Java memory management. Dive deep into the JVM Memory Model, Heap, Stack, Garbage Collection, and best practices.

URL: https://www.progressiverobot.com/java-qr-code-generator-zxing-example/ Today we will look into the Java QR code generator program. If you are tech and gadget savvy, then you must be aware of the QR code. You will find it everywhere these days – in blogs, websites, and even in some public places. This is very popular in mobile apps, where you […]

URL: https://www.progressiverobot.com/java-thread-dump-visualvm-jstack-kill-3-jcmd/ Java Thread dump is list of all the threads active in the JVM. Java Thread Dump Java thread dump is very helpful in analyzing bottlenecks in the application and [deadlock](/community/tutorials/deadlock-in-java-example "Java Deadlock") situations. Here we will learn multiple ways through which we can generate thread dump for a java program. These instructions are […]

URL: https://www.progressiverobot.com/javamail-example-send-mail-in-java-smtp/ Today we will look into JavaMail Example to send email in java programs. Sending emails is one of the common tasks in real life applications and that's why Java provides robust JavaMail API that we can use to send emails using SMTP server. JavaMail API supports both TLS and SSL authentication for sending […]

URL: https://www.progressiverobot.com/pyramid-pattern-programs-in-java/ Pattern programs are used a lot in interviews to understand the logical thinking abilities of the interviewee. Pyramid patterns are very popular and once we get the logic on the way it's created, writing code to achieve the same is an easy task. Pyramid Pattern Programs in Java !Pyramid Pattern Programs in Java […]

URL: https://www.progressiverobot.com/sort-hashmap-by-value-java/ HashMap in java provides quick lookups. They store items in "key, value" pairs. To get a value from the HashMap, we use the key corresponding to that entry. HashMaps are a good method for implementing Dictionaries and directories. Key and Value can be of different types (eg – String, Integer). We can sort […]