This example belongs to Eclipse JDT Tutorial Series. First of all, Eclipse JDT ASTParser CAN work in a standard Java application. This privides the convenience of simple parsing of a large amount of Java class files. Suppose you want to parse 100 .java files which are under a directory. You would not be able to … Read more
How to read file content into a string? The following is the Java code to do that. To make it work, the filePath need to be changed. public static String readFileToString() throws IOException { File dirs = new File("."); String filePath = dirs.getCanonicalPath() + File.separator+"src"+File.separator+"TestRead.java"; StringBuilder fileData = new StringBuilder(1000);//Constructs a string buffer with … Read more
If you want to develop Java Desktop application, you probably have two choices of libraries: SWT vs. Swing. Where there is pros and cons for both of them, here is a comparison between them. Recall the role of Standard Widget Tootlkit (SWT) in eclipse platform below. JFace is a high-level user interface(UI) widget library built … Read more
As you may already know that once an object is created, it’s just a series of bytes in the heap. You may be curious about how exactly Java objects look like in the memory? 1. Fields Here is an example of an object layout for class “Base”(B). This class does not have any method. We … Read more
Java access level contains two parts: 1) access level for classes and 2) access level for members. For class access level, the keyword can be public or no explicit modifier(package-private). For member access level, the keyword can be public, protected, package-private (no explicit modifier), or private. The following table summarizes the access level of different … Read more
If a method is private, it means that it can not be accessed from any class other than itself. This is the access control mechanism provided by Java. When it is used appropriately, it can produce security and functionality. Constructors, like regular methods, can also be declared as private. You may wonder why we need … Read more