Some Software Engineering research requires human evaluation. Unlike the program you have control, human factors are sometimes out of your control. To make sure evaluation goes well, the following should be done: 1. Have some backup evaluators in case someone could not complete on time. Even the evaluation is very important, some people may not … Read more
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
Hare is a list of the best conferences in Software Engineering research area. Research in software engineering is very creative. As the feature of software, researchers can build any innovation software as long as it helps software development somehow. ASE – International Conference on Automated Software Engineering ICSE – International Conference on Software Engineering ESEC/FSE … Read more
All you need is this simple function in java.lang package. Character.isDigit(c)Character.isDigit(c) Of course, if want to check a character in a string, need to get the char first by using the following. str.charAt(i)str.charAt(i)
My approach This method loop through each character in the string, and determine if each character is in upper case. Upper case letter value is from 97 to 122. public static boolean testAllUpperCase(String str){ for(int i=0; i<str.length(); i++){ char c = str.charAt(i); if(c >= 97 && c <= 122) { return false; } } //str.charAt(index) … Read more
This Java method accepts a camel case string, and returns a linked list of splitted strings. It has been designed to handle various kinds of different cases and fully tested and good to use. Handling camel case in Java involves a lot of styles, this methods can handle the following cases: Regular camel case names, … Read more
When we use Java to write something to a file, we can do it in the following two ways. One uses FileOutputStream, the other uses FileWriter. Using FileOutputStream: File fout = new File(file_location_string); FileOutputStream fos = new FileOutputStream(fout); BufferedWriter out = new BufferedWriter(new OutputStreamWriter(fos)); out.write("something");File fout = new File(file_location_string); FileOutputStream fos = new FileOutputStream(fout); BufferedWriter … Read more
Eclipse RCP provides an easy way to create desktop applications with industry standards. Once you understand how the framework works, it’s very straightforward to add more views, perspectives, etc. This article shows how to create a simple rich client application with a view by using development wizard. It also explains the role of each file … Read more
Why transfer content from one file to another? When we do analysis on content in files, we may need to read content from one file and do various kinds of processing (e.g. exclude/add/modify some parts), and then output results to another file. This process occurs very often if you do simple program analysis or file … Read more
Replace vs Append/Add If you want your code to create a new file and erase previous existing file, FileWriter can simply take it place. To replace all content in an existing file, use this: FileWriter fstream = new FileWriter(loc);FileWriter fstream = new FileWriter(loc); The code above will delete the existing file if it’s name is … Read more
This post summarizes the classes that can be used to write a file. 1. FileOutputStream public static void writeFile1() throws IOException { File fout = new File("out.txt"); FileOutputStream fos = new FileOutputStream(fout); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fos)); for (int i = 0; i < 10; i++) { bw.write("something"); bw.newLine(); } bw.close(); … Read more