java기출문제

[2024 1회]class Connection{ private static Connection _inst = null; private int count = 0; static public Connection get(){ if(_inst == null){ _inst = new Connection(); return _inst; } return _inst; } public void count(){ count++; } public int getCount(){ return count; }}public class main{ public static void main(String[] args){..

[23년 1회]class Static{ public int a=20; static int b=0;}public class Main{ public static void main(String[] args){ int a = 10; Static.b=a; Static st = new Static(); System.out.println(Static.b++); System.out.println(st.b); System.out.println(a); Systme.out.println(st.a); }}더보기정답10111020 [풀이]✔️ static 필드 b는 모든 객체가 공유, 어떤 객체로 접근하던지간에 b의..

[22년 1회]class A{ int a; int b;}public class Main{ static void func1(A m){ m.a *= 10; } static void func2(A m){ m.a += m.b; } public static void main(String args[]){ A m = new A(); m.a = 100; func1(m); m.b = m.a; func2(m); System.out.printf("%d", m.a); }}더보기정답 : 2000 // (가)에 들어갈 알맞은 답을 쓰시오.class Car implements Runnabl..

[21년 1회]public class Main { public static void main(String[] args) { int arr[][] = new int[][]{{45,50,75},{89}}; System.out.println(arr[0].length); System.out.println(arr[1].length); System.out.println(arr[0][0]); System.out.println(arr[0][1]); System.out.println(arr[1][0]); }}더보기정답31455089 public class Main{ public static void main(String[] args){ i..

[20년 1회]class Main{ static int[] arr() { int a[] = new int[4]; int b = a.length; for(int i=0; i더보기정답 : 0 1 2 3[20년 2회]// (가)에 들어갈 알맞은 답class Parent{ void show(){System.out.println("parent");}}class Child extends Parent{ void show() {System.out.println("child");}}class Main { public static void main(String args[]) { Parent pa= (가) Child(); pa.show(); }}더보기정답 : new ..