How To Fix Server Error In Java Servlet?

-
Right Click on project
Properties-->Project Facets-->Runtimes-->Apache Tomcate-->Apply and Close




Comments

Post a Comment

Popular posts from this blog

Java Stack and Heap: Java Memory Allocation Lesson.

-
Image
    Stack Memory   Stack in java is a section of memory which contains methods, local variables, and reference variables. Local variables are created in the stack. Java Stack memory is used for the execution of a thread. They contain method-specific values that are short-lived and references to other objects in the heap that is getting referred from the method. Stack  memory is always referenced in  LIFO (Last-In-First-Out)  order. Whenever a method is invoked, a new block is created in the stack memory for the method to hold local primitive values and reference to other objects in the method. As soon as the method ends, the block becomes unused and becomes available for the next method. Stack memory size is very less compared to Heap memory. Key Features of Stack Memory Apart from what we have discussed so far, following are some other features of  Stack  memory: It grows and shrinks as new methods are called and returned respectiv...
Read more

What is JVM, JDK and JRE in Java?

-
Image
What is JVM? Java Virtual machine  (JVM) is the virtual machine that runs the Java bytecodes. You get this bytecode by compiling the  .java  files into  .class  files.  .class  files contain the bytecodes understood by the JVM.   In the real world, JVM is a specification that provides a runtime environment in which Java bytecode can be executed. Different vendors provide different implementations of this specification. For example, this wiki page lists down different JVM implementations. Most popular implementation of JVM is Hotspot which is owned and provided by Oracle Corporation. ( Previously by Sun Microsystems, Inc. ). JVM delivers the optimal performance for Java applications using many advanced techniques, incorporating a state-of-the-art memory model,  garbage collector , and  adaptive optimizer . JVM comes in two different flavors –  client  and  server . Although the Server and the Client VMs ar...
Read more

Java Memory Allocation.

-
Image
              Memory Management in Java  Memory allocation  is a process by which computer programs and services are assigned with physical or virtual  memory  space.  In Java, memory management is the process of allocation and de-allocation of objects, called Memory management. Java does memory management automatically. Java uses an automatic memory management system called a  garbage collector . Thus, we are not required to implement memory management logic in our application. Java memory management divides into two major parts: JVM Memory Structure Working of the Garbage Collector     Types of Memory areas allocated by the JVM:                      JVM creates various run time data areas in a heap. These areas are used during the program execution. The memory areas are destroyed when JVM exits, whereas the data areas are destroyed when ...
Read more