1. \t 和\r 如何用？
2. javax.swing.* 中，swing代表咩？
3. java.util.* 中，util 代表咩？
4. System.exit() 有何用？()中的integer 代表咩？
5. 咩叫inner class？
6. 在showMessageDialog 中，不要特別icon 但係想用title bar，可吾可以只寫(null,"_____","____")？
7. public static void main (String args []) 中，args[] 已經可以用來儲string，為何要用Scanner？
THX~
java 新手的問題
2012-10-17 1:07 am
回答 (2)
2012-10-17 3:40 am
✔ 最佳答案
1. 用下就知2. swing中譯搖擺，但程式上係冇意思，你只需要知道點用
3. util冇中譯，但英文就有工具意思，等同java只不過係名稱，真正意思係咖啡
4. 試用就知，寫程式係要試
5. inner class係一個class中之class
6. 試用就知，冇人唔俾你試
7, args係一個argument，當你執行程式時需要加上一個數值或字串，叫做parameter，例如println("hello world")
2012-10-17 1:57 pm
\t = tab in text eg. system.out.println("love"+"\t"+"you"); //spacing of text
display = love you something like that :D
\r = carriage return e.g like you press enter on text...
javax.swing.* = from lib. of javax inside have many lib. -_- and get swing class and * stand for any lib in javax.swing that was used. (swing class mostly use in drawing etc.)
util = configuration, tools, that helps us from programming, such as requirement of HashMap,Tree and Arrays
System.exit() = exit of the whole program, integer inside shows the status of the exit (emergency exit?/ exit in friendly way?)
JOptionPane.showMessageDialog(null,"_____","_____",JOptionPane.PLAIN_MESSAGE, null); //use constant
Scanner = is to help with analysis text in nice Token way,compare to bufferedReader which goes by each character/line, so if you have number and String together like "x 2", scan.nextInt() are use to get number even if string were there at front
display = love you something like that :D
\r = carriage return e.g like you press enter on text...
javax.swing.* = from lib. of javax inside have many lib. -_- and get swing class and * stand for any lib in javax.swing that was used. (swing class mostly use in drawing etc.)
util = configuration, tools, that helps us from programming, such as requirement of HashMap,Tree and Arrays
System.exit() = exit of the whole program, integer inside shows the status of the exit (emergency exit?/ exit in friendly way?)
JOptionPane.showMessageDialog(null,"_____","_____",JOptionPane.PLAIN_MESSAGE, null); //use constant
Scanner = is to help with analysis text in nice Token way,compare to bufferedReader which goes by each character/line, so if you have number and String together like "x 2", scan.nextInt() are use to get number even if string were there at front
收錄日期: 2021-04-13 19:03:07
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https://hk.answers.yahoo.com/question/index?qid=20121016000051KK00262