???%20java??

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??? java??

• ???
• ??? 13007432216
• ?220436907 QQ346260267
• ysh_at_hnu.edu.cn
• kczx.hnu.cn
• ?????

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• ????
• 1.?? // ???? / ???? /
• 2???????????????,?????,???????????
• 3????????,???????
• 4?public class ?? ????????????
• 5?int long short char byte boolean float
  double
• 5???
• System.out.print(??????)
• System.out.println(??????)
• \r \n \t \\ \" ?? ?? ?? \ "
• System.out.printf("?????",?????)
• md m.nf e g u o s c
  
• String.format("?????",?????)

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• ????
• 6???import java.util.Scanner
• Scanner inputnew Scanner(System.in)
• int i1input.nextInt() nextByte(),nextLong(),
  nextShort()
• float f1input.nextFloat()nextDouble(),
• String s1input.nextLine()
• System.in.read()
• BufferedReader brnew BufferedReader(new
  InputStreamReader(System.in))
• Integer.parseInt() Float.parseFloat()
• Double.parseDouble()
• 7? / - (?????) 10/3?3,??3.333
• lt gt lt gt(??????2?) ! (??) ?-?-?

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• ????
• 6???import java.util.Scanner
• Scanner inputnew Scanner(System.in)
• int i1input.nextInt()
• ??String,System ??java.lang??,???????,????
• ??????class??,???????,?????
• 7?????
• Math.abs() Math.ceil() Math.floor(),Math.max(),
  Math.min() Math.random() 0-1
• Math.rint(11.5) Math.rint(10.5) ,Math.round()
• Math.int() Math.sin(),Math.cos(),Math.exp(),
• Math.long() Math.pow(a,b) Math.sqrt()
• Math.toDegrees() Math.toRadians()

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