Oracle
Design by. CYH
๋ฐœํ‘œ์ž : ์ตœ ์šฉํ˜ธ
A TE+
โœ“ ํ”„๋กœ๊ทธ๋žจ ์ƒ์„ฑ ๊ณผ์ •
โœ“ JDK ์„ค์น˜
โœ“ Eclipse ์„ค์น˜
โœ“ ์ž๋ฐ” ํ™˜๊ฒฝ ์„ค์ •
โœ“ ์ฝ˜์†” ์ž…๋ ฅ๊ณผ ์ถœ๋ ฅ
โœ“ ๋ณ€์ˆ˜, ์ž๋ฃŒํ˜•
โœ“ ์—ฐ์‚ฐ์ž
โœ“ ์กฐ๊ฑด๋ฌธ
โœ“ ๋ฐ˜๋ณต๋ฌธ
โœ“ Q&A
+
GA TE
+
GA TE
FirstJavaProgram.java
javac.exe์—
์˜ํ•œ ์ปดํŒŒ์ผ
FirstJavaProgram.class
Java Virtual Machine
java.exe
์— ์˜ํ•œ ์‹คํ–‰
http://www.youtube.com/watch?v
=-9lUCQVsgnU&feature=youtu.be
+
GA TE
http://www.youtube.com/watch?v
=-9lUCQVsgnU&feature=youtu.be
http://www.youtube.com/watch?v
=dnP2g4T_otY&feature=youtu.be
+
GA TE
โž”ํ™˜๊ฒฝ ๋ณ€์ˆ˜ ์„ค์ •
โ—†์ œ์–ดํŒ>์‹œ์Šค
ํ…œ>๊ณ ๊ธ‰ ์‹œ์Šคํ…œ
์„ค์ •>ํ™˜๊ฒฝ๋ณ€์ˆ˜
1
2
+
GA TE
http://www.youtube.com/watch?v
=-9lUCQVsgnU&feature=youtu.be
โž”Eclipse
JAVAํ”„๋กœ์ ํŠธ ์ƒ์„ฑ ํ•˜๊ธฐ
+
GA TE
+
GA TE
public class (ํด๋ž˜์ŠคํŒŒ์ผ์ด๋ฆ„) {
public static void main(String[]
args)
{
}
}
ํด๋ž˜์Šค
๋ฉ”์†Œ๋“œ
+
GA TE
โž”C์–ธ์–ด์—์„œ printf ๋Œ€์‹ โ€ฆ
โ—†System.out.println(โ€œ๋ฌธ์žโ€+์ˆซ์ž);
โ—†๊ด„ํ˜ธ์—†๋Š” + ๋Š” ๋ฌธ์ž๋ฅผ ๋ถ™์ด๋Š” ์šฉ๋„
โ—†์†Œ๊ด„ํ˜ธ()๋Š” ์ˆ˜ํ•™์  ๊ธฐํ˜ธ
+
GA TE
โž”C์–ธ์–ด์—์„œ scanf ๋Œ€์‹ โ€ฆ
โ—†#include <stdio.h> ์„ ํ•œ๊ฒƒ์ฒ˜๋Ÿผ
โž”๋ณ€์ˆ˜
โ—†๋ฐ์ดํ„ฐ๋ฅผ ์ผ์‹œ์ ์œผ๋กœ ์ €์žฅํ•  ๋ชฉ์ ์œผ๋กœ ์‚ฌ์šฉ
๋˜๋Š” ๊ทธ๋ฆ‡ ex) int a;
โž”์ž๋ฃŒํ˜•
โ—†์ •์ˆ˜ํ˜• : short, int, long
โ—†์‹ค์ˆ˜ํ˜• : float, double, long double
+
GA TE
โž”ํŠน์ดํ•œ ์ 
โ—†floatํ˜•์„ ์‚ฌ์šฉํ•˜๋ ค๋ฉด
โ—‹ float num=7.125f(F)
โ—†longํ˜•์„ ์‚ฌ์šฉํ•˜๋ ค๋ฉด
โ—‹ long num=10000000l(L)
+
GA TE
โž”๋…ผ๋ฆฌ์—ฐ์‚ฐ์ž
โ—†|| : or , && : and
โž”๊ด€๊ณ„์—ฐ์‚ฐ์ž
โ—†>, <, >=, <=
โ—†A!=0 : A๊ฐ’์ด 0์ด ์•„๋‹ˆ๋‹ค.
โ—†A==0 : A๊ฐ’์ด 0๊ณผ ๊ฐ™๋‹ค.
+
GA TE
http://www.youtube.com/watch?v
=-9lUCQVsgnU&feature=youtu.be
โž”์ฆ๊ฐ์—ฐ์‚ฐ์ž
+
GA TE
a=++x a ์ˆ˜์‹์˜ ๊ฐ’์€ ์ฆ๊ฐ€๋œ x๊ฐ’
(์„  ์ฆ๊ฐ€ ํ›„ ์ €์žฅ)
a=x++ a ์ˆ˜์‹์˜ ๊ฐ’์€ ์ฆ๊ฐ€๋˜์ง€ ์•Š์€ ์›๋ž˜์˜ x๊ฐ’
(์„  ์ €์žฅ ํ›„ ์ฆ๊ฐ€)
a=--x a ์ˆ˜์‹์˜ ๊ฐ’์€ ๊ฐ์†Œ๋œ x๊ฐ’
(์„  ๊ฐ์†Œ ํ›„ ์ €์žฅ)
a=x-- a ์ˆ˜์‹์˜ ๊ฐ’์€ ๊ฐ์†Œ๋˜์ง€ ์•Š์€ ์›๋ž˜์˜ x๊ฐ’
(์„  ์ €์žฅ ํ›„ ๊ฐ์†Œ)
+
GA TE
โž”if, else ๋ฌธ - main ๋ฉ”์†Œ๋“œ ์•ˆ์—์„œ ์„ ์–ธ.
if(์กฐ๊ฑด)
{ ์กฐ๊ฑด์ด ์„ฑ๋ฆฝํ•˜๋ฉด ์‹คํ–‰}
else if(์กฐ๊ฑด)
{ ์‹คํ–‰ }
else
{์‹คํ–‰}
โž”switch ๋ฌธ
+
GA TE
+
GA TE
โž”for ๋ฌธ - main ๋ฉ”์†Œ๋“œ ์•ˆ์—์„œ ์„ ์–ธ.
์ดˆ๊ธฐ ๋ณ€์ˆ˜>์กฐ๊ฑด์‹>๋น„๊ต์‹์—
์„œ ๋น„๊ต
for(์ดˆ๊ธฐ ๋ณ€์ˆ˜;๋น„๊ต์‹;์กฐ๊ฑด์‹)
{
๋‚ด์šฉ
}
+
GA TE
โž”while ๋ฌธ - main ๋ฉ”์†Œ๋“œ ์•ˆ์—์„œ ์„ ์–ธ
while ์˜† ์กฐ๊ฑด์— ๋งž์œผ๋ฉด ๋ฐ˜๋ณต๋ฌธ ํƒˆ
์ถœ!
whil(์กฐ๊ฑด์‹)
{
๋‚ด์šฉ
}
http://www.youtube.com/watch?v
=-9lUCQVsgnU&feature=youtu.be
Q&A
http://www.youtube.com/watch?v
=-9lUCQVsgnU&feature=youtu.be
์—ฐ์Šต๋ฌธ์ œ.1
Switch๋‚˜ ์กฐ๊ฑด๋ฌธ์„ ์ด์šฉํ•ด์„œ ๊ณ„์‚ฐ
๊ธฐ๋ฅผ ๋งŒ๋“œ์‹œ์˜ค.
(case์— ๋ฌธ์ž๋ฅผ ๋‚˜ํƒ€๋‚ผ ๋•Œ๋Š” โ€œ+ โ€)
(๋ฌธ์ž ์ž…๋ ฅ ์‹œํ‚ฌ ๋•Œ๋Š” nextLine();
์•„๋‹Œ
Scanner ๋ณ€์ˆ˜ =next();)
http://www.youtube.com/watch?v
=-9lUCQVsgnU&feature=youtu.be
์ถ”๊ฐ€๋ฌธ์ œ
์ž๋ฐ” ๋žœ๋ค ํ•จ์ˆ˜๋ฅผ ๊ฒ€์ƒ‰ ํ•ด์„œ ๊ฐ€์œ„
๋ฐ”์œ„๋ณด ํ”„๋กœ๊ทธ๋žจ์„
์ž๋ฐ”๋กœ ์งœ๋ณด์‹œ์˜ค.

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