Java constructor example code#

Java constructor defines what occurs when an object of that class is created.So such type of java constructor is called as the default constructor, and if you are not mentioning one in your program the compiler will add it during compilation to your program. The default constructor means that something will not have anything in the body, so the java constructor will be having the name of the class as its name, so just it will be having the class name followed by parentheses and an open bracket and close bracket

Java constructor example code#

In your source code there will be no java constructor, but when this source code is converted to the byte code, so when it is converted after compilation it is converted into byte code is nothing but it is a dot class(.class) file so inside your dot class file you will be finding the default java constructor.

so in your source code so if you say this is your source code. What will happen if you are not writing the constructor so what will happen is the compiler during compilation time the compiler will add the default constructor to your code the compiler will add the default constructor during compilation to your code. When I didn’t use the java constructor in the general form so it is not compulsory to write the java constructor in your class. So this is the java constructor, The java constructor is mandatory for us to give the constructor so if you just refer to the previous article that I have taught you so I have given the general form of the class. The class name followed by parentheses is called the constructor One thing that you need to keep in mind about the new operator is that so this always will not create will not allocate memory for you because memory is finite since memory is finite there are chances that it may not create it may not allocate memory for the object on the heap so there are chances that it will not allocate the memory so in case if new operator is not able to in case if JVM is not able to create a memory for the object on the heap it will give an error which is OutOfMemoryError and this error will be found during runtime the simple programs that we write may be memory will be allocated but when you are working with real-world, projects then maybe you may encounter such kind of situation. So this is the syntax of creating an object so you have the class name then the reference variable then new operator is used for allocating memory on the heap for the object and then class name followed by the parenthesis.