* annotation { u2 type_index; u2 num_element_value_pairs; { u2 element_name_index; element_value value; } e

* attribute_info { u2 attribute_name_index; u4 attribute_length; u1 info[attribute_length]; } */

Can be used in shorten url. Store urls in DB and get an id, then encode this id to a [a-zA-Z0-9] string

* A Java try {} catch() {} finally {} block */

* |-------------------------------------------------------------------------- | Bootstrap class loader implemented in VM internally |-----------------

Compilation: javac Calendar.java Execution: java Calendar month year This program takes the month and year as command-line arguments and print

* ClassFile { u4 magic; u2 minor_version; u2 major_version; u2 constant_pool_count; cp_info constant_pool[constant_pool_co

A class loader is an object that is responsible for loading classes. The class <tt>ClassLoader</tt> is an abstract class. Given the <a href="#name">b

* Code_attribute { u2 attribute_name_index; u4 attribute_length; u2 max_stack; u2 max_locals; u4 code_length; u1 code[c

** * Runtime constant pool */

* CONSTANT_Class_info { u1 tag; u2 name_index; } */

* CONSTANT_Double_info { u1 tag; u4 high_bytes; u4 low_bytes; } */

* CONSTANT_Fieldref_info { u1 tag; u2 class_index; u2 name_and_type_index; } */

* CONSTANT_Float_info { u1 tag; u4 bytes; } */

* CONSTANT_Integer_info { u1 tag; u4 bytes; } */

* CONSTANT_InterfaceMethodref_info { u1 tag; u2 class_index; u2 name_and_type_index; } */

* CONSTANT_InvokeDynamic_info { u1 tag; u2 bootstrap_method_attr_index; u2 name_and_type_index; } */

* CONSTANT_Long_info { u1 tag; u4 high_bytes; u4 low_bytes; } */

* CONSTANT_MethodHandle_info { u1 tag; u1 reference_kind; u2 reference_index; } */

* CONSTANT_MethodType_info { u1 tag; u2 descriptor_index; } */

* CONSTANT_Methodref_info { u1 tag; u2 class_index; u2 name_and_type_index; } */

* CONSTANT_NameAndType_info { u1 tag; u2 name_index; u2 descriptor_index; } */

* cp_info { u1 tag; u1 info[]; } */

* CONSTANT_String_info { u1 tag; u2 string_index; } */

* CONSTANT_Utf8_info { u1 tag; u2 length; u1 bytes[length]; } */

Consumer Class.

* element_value { u1 tag; union { u2 const_value_index; { u2 type_name_index; u2 const_name_index; } en

* |-------------------------------------------------------------------------- | Execution Engine |----------------------------------------------------

* field_info { u2 access_flags; u2 name_index; u2 descriptor_index; u2 attributes

* |-------------------------------------------------------------------------- | Heap structure |------------------------------------------------------

* LineNumberTable_attribute { u2 attribute_name_index; u4 attribute_length; u2 line_number_table_length; { u2 start_pc;

* LocalVariableTable_attribute { u2 attribute_name_index; u4 attribute_length; u2 local_variable_table_length; { u2 start_pc;

* method_info { u2 access_flags; u2 name_index; u2 descriptor_index; u2 attribute

* |-------------------------------------------------------------------------- | Method Area structure |-----------------------------------------------