In this article, we are going to use Eclipse JDT to create, access and load projects. I assume that you know how to create a simple Eclipse plug-in project which adds a menu item that you can click and trigger some actions. If you don’t know, you can go to this article. The reason why … Read more
This post belongs to Eclipse JDT Tutorial Series. This error message starts the whole JDT ASTParser tutorial series. Exception in thread “main” java.lang.IllegalStateException: Workspace is closed. at org.eclipse.core.resources.ResourcesPlugin.getWorkspace(ResourcesPlugin.java:340) at Main.main(Main.java:20) In brief, this is caused by simply adding dependent jar files to regular java project. To use JDT, you need to have the program running … Read more
Visitor pattern is a design pattern commonly used in the parser of a compiler, such as Eclipse JDT AST Parser. Basically, there are two interfaces – Visitor and Element – in Visitor pattern. Visitor pattern story Suppose a first time visitor comes to New York City. He want to visit the city and the city … Read more
Operating System concepts hierarchy diagram. This contains all major topics of this course.
Let each node’s left child be the next smaller node and each node’s right child be the next bigger node. Node prev = null; Node head = null; public Node treeToDoublyList(Node root) { if (root == null) { return null; } helper(root); head.left = prev; prev.right = head; return head; } … Read more