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class Ph { /*콜바이 벨류 public static void swap(int a, int b) { int memory=a; a=b; b=memory; System.out.printf("%d %d",a,b); } public static void main(String[] args) { int num=Integer.parseInt(args[0]); int num2=Integer.parseInt(args[1]); swap(num,num2); */ //콜바이 레퍼런스 public static void swArr(int [] ar) { int w=ar[0]; ar[0]=ar[1]; ar[1]=w; System.out.printf("%d %d\n",ar[0],ar[1]); } public static vo..

import java.util.*; class Ph { public static void main(String[] args) throws Exception { int [] numArr={1,5,3,2,7}; Arrays.sort(numArr); for (int i : numArr){ System.out.print(i+" "); Thread.sleep(500); System.out.print("\r"); Thread.sleep(500); System.out.print("잠시만 기달려"); Thread.sleep(500); System.out.print("\r"); } } }

class arr { public static void main(String[] args) { int [][] aS=new int [5][3] ; int [] aSc=new int [15]; for (int i=0;i

class StringTest { public static void main(String[] args) { String str = "abcd"; String str2 = str.replace( 'a', 'z') ; System.out.println(str2); System.out.println(str2.indexOf("b")); System.out.println(str2.toUpperCase()); char [] ch1= str.toCharArray(); for (int i=0;i

class Jh{ public static void main(String[] args)throws Exception { for (int a=1; a

class main{ public static void main(String[] args) { int num=1; for (int a=0; aa ;space-- ) { System.out.print(" "); } for (int b=0;b

class main{ public static void main(String[] args) { String str=args[0]; int birth= Integer.parseInt("19"+str.substring(0,2)); System.out.println(birth); } }

class main{ public static void main(String[] args) { String str = args[0]; char ch; ch=str.charAt(0); switch(ch){ case 'a': case 'A':System.out.printf("America %c",ch); break; case 'b': case 'B':System.out.println("brazil " +ch); break; default: System.out.println("알아서 하시길");break; } }

class main{ public static void main(String[] args) { String num1 = args[0]; String num2 = args[1]; int sum = Integer.parseInt(num1) +Integer.parseInt(num2); System.out.println("num1 = " + num1); System.out.println("sum = " + sum); } }

public class Main{ public static void main(String[] args) { System.out.println("hello world!!!!"); } }