[생활코딩] Java - 실행 - 리눅스

(base) eomminjeong@eomminjeong-ui-MacBookAir ~ % mkdir java_tutorials
(base) eomminjeong@eomminjeong-ui-MacBookAir ~ % cd java_tutorials
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % ls -al
total 0
drwxr-xr-x   2 eomminjeong  staff    64  4 10 23:14 .
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % vi Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % -al
zsh: command not found: -al
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % ls -al
total 8
drwxr-xr-x   3 eomminjeong  staff    96  4 10 23:40 .
drwxr-xr-x+ 51 eomminjeong  staff  1632  4 10 23:40 ..
-rw-r--r--   1 eomminjeong  staff   100  4 10 23:40 Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % javac Helloworld.java 
Helloworld.java:3: error: package system does not exist
		system.out.println("Hello world");
		      ^
1 error
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % vi Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % javac Helloworld.java
Helloworld.java:3: error: ';' expected
		System.out.println("Hello world")
		                                 ^
1 error
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % vi Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % javac Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % ls -al
total 16
drwxr-xr-x   4 eomminjeong  staff   128  4 10 23:47 .
drwxr-xr-x+ 52 eomminjeong  staff  1664  4 10 23:47 ..
-rw-r--r--   1 eomminjeong  staff   100  4 10 23:47 Helloworld.java
-rw-r--r--   1 eomminjeong  staff   424  4 10 23:47 Hellowrld.class
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % java Helloworld
Error: Could not find or load main class Helloworld
Caused by: java.lang.ClassNotFoundException: Helloworld
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % vi Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % java Helloworld.java
world Hello
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % ls -al
total 16
drwxr-xr-x   4 eomminjeong  staff   128  4 10 23:49 .
drwxr-xr-x+ 52 eomminjeong  staff  1664  4 10 23:49 ..
-rw-r--r--   1 eomminjeong  staff   100  4 10 23:49 Helloworld.java
-rw-r--r--   1 eomminjeong  staff   424  4 10 23:47 Hellowrld.class
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials %
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % javac Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % ls -al
total 16
drwxr-xr-x   4 eomminjeong  staff   128  4 11 00:03 .
drwxr-xr-x+ 52 eomminjeong  staff  1664  4 11 00:02 ..
-rw-r--r--   1 eomminjeong  staff   425  4 11 00:03 Helloworld.class
-rw-r--r--   1 eomminjeong  staff   101  4 11 00:02 Helloworld.java
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials % java Helloworld   
Hello world
(base) eomminjeong@eomminjeong-ui-MacBookAir java_tutorials %

Helloworld

완성

정말 오타가 많다!

 

mkdir {{파일명}} // 폴더 생성
ls -al // 폴더 내 파일 확인
vi {{파일명}}.java // 파일 내용 편집
javac {{파일명}}.java // JVM이 이해할 수 있도록 컴파일러 실행
java {{파일명}} //실행

 

vi 편집기 자주 쓰는 명령어

i : 삽입

d: 삭제

:wq 저장 및 나오기

R : 수정모드

vi 편집기 명령어

참고 블로그 : http://igoto.x-y.net/xe/linux/154

Linux - vi편집기 사용법