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Its the new operator that does that job, everything you do in a constructor is just setting up(ex, states of object) and making the object ready to use ' Since Constructor is used to create object'- this is where i had to stop reading further-Ĭonstructors DO NOT CREATE OBJECTS. Its advntage is that we dnt need to cal any method for this since costructor is calld at d tym of obj creationĬonstructor has same access modifier as class' - what do you mean? For eg.if i want to give any welcome message to user at that tym i can use construcor by writing dat message in constructor. If v want tobperform any operation predifindly dan v can use constructor. A constructor is always invoked the new keyword is executed & completed. Compiler will invoke the default constructor when no specified/parameterized constructor is used for instantiation. Maat Constructor in Java is the no argument constructor. What is default constructor in Java ? does default and no argument constructor is same? When will compiler inject default constructor and when it does not ?Ī)why do we need to include constructor in the class andĮvery class atleast has one constructor whether u creat it or not when u not creat constructor compiler creat it by nstructor is nothing it jst reserved the memory No such constructor in your class it will fail with compilation error. Means call to no argument constructor of super class and since there is Suppose another sub class is createdĪnd you don't add constructor over there than compiler tries to create aĭefault constructor which calls super() at first line. Is chances of having restricted hierarchy. So always provide no argumentĪnother drawback of not providing no argument constructor Will not add default constructor or no arguments constructor, which makes yourĬlass unusable with framework or library which uses reflectionĪnd follow Java Bean naming convention. with one argument or two argument than compiler This is also called default Constructor in Java. Is specified by Programmer, Java Compiler inserts a no argument constructor

Every Class in Java has constructor, if no explicit constructor In SCJP and various other Java Exams and Java Default and No Argument Constructor Here comes another interesting property of constructor which is tested

Java constructor