Java second day classes and objects

Common parent class for all classes: Object class

Method 1:tostring ()

Method 2:equals () compares the reference of an object to a memory address

You can compare the class type of an object with the same property value by overriding the Equals () method: Right-click, source-, overriding Equals and Hashcode methods

GetClass () Method: Returns the class type of the class

Class type: Focus on the property name of the class

Type of class: Focus on the property value of the class

1  Public classEquals {2 3      Public Static voidMain (string[] args) {4         //TODO auto-generated Method Stub5String A1 =NewString ("123ads");6String A2 =NewString ("123ads");7         if(a1==A2)8         {9System.out.println ("= =");Ten         } One         if(A1.equals (A2)) A         { -System.out.println ("String equals"); -         } theCar car1 =NewCar (); -Car car2 =NewCar (); -         if(car1==car2) -         { +System.out.println ("= ="); -         } +         if(Car1.equals (CAR2)) A         { atSystem.out.println ("Equals"); -         } -     } -  -}

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Java second day classes and objects