Char Name="HELL '로' [유니렌] 월드!";

package ch05.sec12;import java.util.Scanner;public class Exam09 { public static void main(String[] args) { int [] students = null; boolean run=true; Scanner sca=new Scanner(System.in); while(run) { System.out.println("----------------------------------------------------"); System.out.println(" 1. 학생수 | 2.점수입력 | 3.점수리스트 | 4.분석 | 5.종료"); System.out.println("-------------------------------..

package ch05.sec12;import java.util.Calendar;public class CalendarExample { public static void main(String[] args) { Calendar now= Calendar.getInstance(); System.out.println(now.get(Calendar.YEAR)); System.out.println(now.get(Calendar.MONTH)+1); System.out.println(now.get(Calendar.DATE)); System.out.println(now.get(Calendar.DAY_OF_WEEK)); }}

package ch05.sec09;public class ArrayCopyByForExample { public static void main(String[] args) { int[] oldIntArray= {1,2,3}; int[] newIntArray= new int[5]; for(int i=0;i 메소드 이용 복사package ch05.sec09;public class ArrayCopyExample { public static void main(String[] args) { String [] oldStringArray= {"Java","array","copy"}; String [] newStringArray= new String[5]; System.arraycopy(oldStringA..

package ch05.sec05;public class SplitExample { public static void main(String[] args) { String board="1,자바 학습,참조 타입 String을 학습합니다.,홍길동"; System.out.println(board.startsWith("1.")); System.out.println(board.endsWith("똥")); System.out.println(board.getBytes()); //16진수 System.out.println(new SplitExample()); //문자열 분리 String[] tokens=board.split(",");//여러값일때 ..

package ch05.sec05;public class IndexOfContainsExample { public static void main(String[] args) { String subject="자바 프로그래밍"; int location=subject.indexOf("프");//해당 문자열 인덱스 값을 찾을 때 (왼쪽부터) //int location=subject.indexOf("프프");//찾으면 인덱스값을 리턴. 그렇지 않으면 -1값 리턴. System.out.println(subject.lastIndexOf("프"));//(오른쪽부터) System.out.println(location); boolean result =subject.contains("자 바");//해..

package ch05.sec05;public class SubStringExample { public static void main(String[] args) { String ssn="950410-2400124"; System.out.println(ssn.substring(0, 6));//인덱스값,위치 System.out.println(ssn.substring(7, 14)); System.out.println(ssn.substring(7, ssn.length())); System.out.println(ssn.substring(7)); System.out.println(ssn.substring(7,8)); }}

package ch05.sec05;public class ReplaceExample { public static void main(String[] args) { String oldStr="자바 문자열은 불변입니다. 자바 문자열은 String입니다."; String newStr=oldStr.replace("자바", "JAVA");//문자열을 찾아 다른 문자열로 교체 기존은 그대로 새로 생성. System.out.println(oldStr); System.out.println(newStr); }}

package ch05.sec05;public class CharAtExample { public static void main(String[] args) { String ssn="950410240124"; char gender=ssn.charAt(6);//문자 추출 int length =ssn.length();//문자 길이 System.out.println("주민등록번호의 길이는 " +length); switch ((gender-48)%2) { case 1: { System.out.println("남자"); break; } case 0: { System.out.println("여자"); break; } } }}

package ch05.sec05;public class EqualsExample { public static void main(String[] args) { String strVar1="홍길동"; String strVar2="홍길동"; System.out.println(strVar1==strVar2);//heap 영역 비교(주소값) System.out.println(strVar1.equals(strVar2));//stack 영역 비교 String strVar3=new String("ABc"); String strVar4=new String("홍길동"); System.out.println(strVar3==strVar4); System.out.println(strVar1.equals(st..

[ Hello World ]public class Main { public static void main(String[] args) { System.out.println("Hello World!"); }} [사칙연산]import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner scanner= new Scanner(System.in); String strNum1=scanner.nextLine(); String strNum2=scanner.nextLine(); int a=Integer.parseInt(strNum1); int b=Integer.parseInt(strNum2); Sy..