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  • rankÇÊ³ó±º Ã¤ÅÃÀç´É¼ö (3)
  • rank¿¥Äï äÅÃÀç´É¼ö (2)
  • rank³ªµµÀ͸í äÅÃÀç´É¼ö (1)
    [°³¹ß/ÇÁ·Î±×·¥]

    °£´ÜÇÑ ÀÚ¹Ù °úÁ¦Àε¥ Ȥ½Ã ´ä Á» Ç®¾îÁֽǼö ÀÖÀ»±î¿ä?

    rank ÃÖ¾¾ÀÔ´Ï´Ù 2021-11-30 (È­) 16:36 Á¶È¸ : 1000

    1,   ÄÚµå¿Í °á°ú¸¦ º¸°í ä¿ö¶ó

    package ch06_12week;

    class A {}

    (                  1          )

    public class q1 {

       public static void main(String[] args) {

    D d = new D();

    System.out.println(d instanceof A );}}

    °á°ú

    True

     

     

    2. ÄÚµå¿Í °á°ú¸¦ º¸°í ä¿ö¶ó

    package ch06_12week;

    class Baap {

    public int h = 4;

    public int getH() {

    System.out.println("Baap " + h);

    return h;}}

     

    public class q2_2 extends Baap {

    public int h = 44;

    public int getH() {

    System.out.println("q2_2 " + h);

    return h;}

    public static void main(String[] args) {

    Baap b = new q2_2();

    (           2        );

    System.out.println(bb.h);

    System.out.println();

    System.out.println(bb.getH());

    }}

    °á°ú

    44

     

    q2_2 44

     

     

    3.4. fi ¸¦ ÀÌ¿ëÇÏ¿© ÄÚµå¿Í °á°ú¸¦ º¸°í ä¿ö¶ó

    package ch06_12week;

    class A4{

          final int fi = 10;

       }

       public class q3 extends A4{

          int fi = 15;

          public static void main(String[] args){

              q3 b = new q3();

              b.fi = 20;

              System.out.println(3    );

              System.out.println(   4 );

          }

       }

    °á°ú

    20

    10

     

     

     

    5. 6. ÄÚµù°ú °á°ú¸¦ º¸°í 5 ¹øÀº qs5 ¸¦ ÀÌ¿ëÇÏ°í 6 ¹øÀº Print ¸¦ ÀÌ¿ëÇ϶ó .

    package ch06_12week;

    class qs5 {

       String Print() {

                 return "A";}}

    class qs6 extends qs5{

       String Print() {

                 return "B";}}

     

    public class qr5{

       public static void main(String[] args) {

              (          5           );

                 (          6           );}}

      

    °á°ú

    B

     

    7. 8. ÄÚµù°ú °á°ú¸¦ º¸°í 7 ¹øÀº ch ¸¦ ÀÌ¿ëÇÏ°í 8 ¹øÀº Print ¸¦ ÀÌ¿ëÇ϶ó .

    package ch06_12week;

    class sp{

       void Print() {

                 System.out.println(" ¼ö Ŭ·¡½º ");}}

    class sc extends sp{

       void Print() {

                 System.out.println(" È÷ Ŭ·¡½º ");}

       void Print(String str) {

                 System.out.println(str);}}

      

    public class q7 {

       public static void main(String[] args) {

                 sp ch=new sc();

                 (7)    ;

                 (8);}}

                

    °á°ú

    È÷ Ŭ·¡½º

     

     

    9.10. ÄÚµù°ú °á°ú¸¦ º¸°í 9 ¹øÀº Member ¸¦ ÀÌ¿ëÇÏ°í 10 ¹øÀº m1 ¸¦ ÀÌ¿ëÇ϶ó .

     

    package ch06_12week;

    public class Member {

    public String name;

    public long number;

    Member(String name, long number){

    this.name=name;

    this.number=number;}

    public String toString() {

    return " À̸§ : "+this.name+" ¹øÈ£ :"+this.number;}}

    package ch06_12week;

    public class MemberT {

    public static void main(String[] args){

    (             9                      );

    (              10                );}}

    °á°ú



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