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Constructor overloading

Constructor overloading. Siti Halisah 0857201000464.

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Constructor overloading

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  1. Constructor overloading SitiHalisah 0857201000464

  2. Konstruktordigunakanuntukmenetapkannilaiawaluntukvariabel instance darikelas. Sebuah default constructor tanpaargumenakandipanggilsecaraotomatisoleh Java Virtual Machine (JVM). Konstruktorselaludisebutoleh operator baru. Konstruktordideklarasikansepertisetelahkamimenyatakanmetode, kecualibahwa constructor tidakmemilikitipekembali. Konstruktordapatkelebihanbebanasalkanmerekaharusmemilikiargumen yang berbedakarena JVM membedakankonstruktoratasdasarargumenberlaludalam constructor. Setiapkali kitamemberikannamametode yang samasepertinamakelas. Ingatmetodeinitidakharusmemilikitipekembali. Inidisebutsebagaikonstruktor overloading. Kamitelahmembuatsatu program pada constructor overloading, setelahmelaluiitukonsep overloading constructor akanmendapatkanlebihjelas. Padacontohdibawahkamitelahmembuattigakonstruktorkelebihanbebanmasing-masingmemilikiargumen yang berbedajenissehingga JVM dapatmembedakanantaraberbagaikonstruktor.

  3. Kode program inidiberikandibawahini: • public class ConstructorOverloading {    public static void main ( String args []){    Rectangle rectangle1= new Rectangle ( 2 , 4 ) ; intareaInFirstConstructor=rectangle1.first () ; System.out.println ( " The area of a rectangle in first constructor is : " + areaInFirstConstructor ) ;    Rectangle rectangle2= new Rectangle ( 5 ) ; intareaInSecondConstructor=rectangle2.second () ; System.out.println ( " The area of a rectangle in first constructor is : " + areaInSecondConstructor ) ;    Rectangle rectangle3= new Rectangle ( 2.0f ) ;    float areaInThirdConstructor=rectangle3.third () ; System.out.println ( " The area of a rectangle in first constructor is : " + areaInThirdConstructor ) ;    Rectangle rectangle4= new Rectangle ( 3.0f , 2.0f ) ;    float areaInFourthConstructor=rectangle4.fourth () ; System.out.println ( " The area of a rectangle in first constructor is : " + areaInFourthConstructor ) ;    } }

  4. class Rectangle { int l, b; float p, q; public Rectangle ( int x, int y ){    l = x;    b = y;    } public int first (){ return ( l * b ) ;    } public Rectangle ( int x ){    l = x;    b = x;    } public int second (){ return ( l * b ) ;    } public Rectangle ( float x ){    p = x;    q = x;    } public float third (){ return ( p * q ) ;    } public Rectangle ( float x, float y ){    p = x;    q = y;    } public float fourth (){ return ( p * q ) ;    } }

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