Scala Scanner类代码示例

//设置package包名称以及导入依赖的类
package com.example

import java.util.Scanner

import scala.annotation.tailrec


object InsertionSort {
  def main(args: List[String]) {

    val s = new Scanner(System.in)
    val a = s.nextInt()
    val numbers: Array[Int] = Array.fill(a){0}
    for(i <- 0 until a) {
      numbers(i) = s.nextInt()
    }

    println(sort(numbers.toList).mkString(","))
  }

  def insert(element: Int, acc: List[Int]): List[Int] = {
    def insertHelper(elements: List[Int]): List[Int] = elements match {
      case Nil => List(element)
      case head :: tail if element < head  => element :: head :: tail
      case head :: tail => head :: insert(element, tail)
    }

    insertHelper(acc)
  }


  def sort(numbers: List[Int]): List[Int] = {
    def sortHelper(unsorted: List[Int], acc: List[Int]): List[Int] = unsorted match {
      case Nil => acc
      case head :: tail => sortHelper(tail, insert(head, acc))
    }
    sortHelper(numbers, Nil)
  }

} 

//设置package包名称以及导入依赖的类
package com.example.gcd

import java.util.Scanner

import com.example.util.BenchmarkHelper._

import scala.math.BigInt


object GCDEuclidian extends App{

  def calculateGCDfor(a: BigInt, b: BigInt): BigInt = {
    if (b == BigInt(0)) a
    else {
      if(a > b) calculateGCDfor(b, a - b * (a / b))
      else calculateGCDfor(a, b - a * (b / a))
    }
  }

  val  s = new Scanner(System.in)
  val a = s.nextBigInteger()
  val b = s.nextBigInteger()

  //Test for example for a = 74356764380* 13   &   b = 74356764380 * 5
  time {
    println{
      s"GCD for numbers $a and $b is: \t" + calculateGCDfor(a, b)
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.example.gcd

import java.util.Scanner

import com.example.util.BenchmarkHelper._


object GCD extends App{

  def calculateGCDfor(a: BigInt, b: BigInt): BigInt = {
    var biggestGCD: BigInt = 1
    for( i <- BigInt(1) to a + b) {
      if(a % i == 0 && b % i == 0) biggestGCD = i
    }
    biggestGCD
  }

  val  s = new Scanner(System.in)
  val a = s.nextBigInteger()
  val b = s.nextBigInteger()

  time {
    println{
      s"GCD for numbers $a and $b is: \t" + calculateGCDfor(a, b)
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.example.fibbonaci

import java.util.Scanner
import com.example.util.BenchmarkHelper._


object FibbonaciNumbers extends App{

  def calculateFibbFor(n: Int): Int = n match {
    case number if number <= 1 => number
    case number if number > 1 => calculateFibbFor(number -1) + calculateFibbFor(number -2)
  }

  val  s = new Scanner(System.in)
  val a = s.nextInt()

  time {
    println{
      s"Fibbonaci for number $a:" + calculateFibbFor(a)
    }
  }
} 

//设置package包名称以及导入依赖的类
package com.example


import java.util.Scanner


object SelectionSort {
  def main(args: Array[String]) { // what if we have linked list

    val s = new Scanner(System.in)
    val a = s.nextInt()
    val numbers: Array[Int] = Array.fill(a){0}
    for(i <- 0 until a) {
      numbers(i) = s.nextInt()
    }

    println(sort(numbers).mkString(","))
  }

  def sort(numbers: Array[Int]): Array[Int] = {
    val n = numbers.size

    for {i <- 0 until n} yield {
      var minOfLeft = i
      for {j <- i + 1 until n} yield {
        if (numbers(j) < numbers(i)) minOfLeft = j
      }
      val temp = numbers(i)
      numbers(i) = numbers(minOfLeft)
      numbers(minOfLeft) = temp

    }
    numbers
  }

} 

//设置package包名称以及导入依赖的类
import java.util.Scanner


object MaxPairwiseProduct {
  def main(args: Array[String]) {

    val s = new Scanner(System.in)
    val a = s.nextInt()
    val numbers: Array[Int] = Array.fill(a){0}
    for(i <- 0 until a) {
      numbers(i) = s.nextInt()
    }


    println(findMaxPairwise(numbers))
  }

  def findMaxPairwise(numbers: Seq[Int]): Long = {
    val n = numbers.size
    var maxIndex1 = -1
    var maxIndex2 = -1
    for{ i <- 0 until n } yield {
      if( maxIndex1 == -1 || numbers(i) > numbers(maxIndex1)) maxIndex1 = i
    }
    for{ j <- 0 until n if j != maxIndex1} yield {
      if(maxIndex2 == -1 || numbers(j) > numbers(maxIndex2)) maxIndex2 = j
    }
    numbers(maxIndex1).asInstanceOf[Long] * numbers(maxIndex2)
  }

} 

//设置package包名称以及导入依赖的类
package com.bob.scalatour.utils

import java.io._
import java.util.Scanner

import com.google.common.io.CharStreams

object FileUtils {

  
  def usingScanner(inputStream: InputStream): String = {
    using(new Scanner(inputStream)) {
      scanner => {
        val fileContent = scanner.useDelimiter("\\A").next()
        fileContent
      }
    }
  }

  def using[A <: {def close() : Unit}, B](param: A)(f: A => B): B =
    try {
      f(param)
    } finally {
      param.close()
    }

  def writeToFile(fileName: String, data: String) =
    using(new FileWriter(fileName, true)) {
      fileWriter => {
        fileWriter.append(data)
      }
    }
} 

//设置package包名称以及导入依赖的类
package nl.dykam.hangman.client.actors

import java.util.Scanner

import akka.actor.Actor
import nl.dykam.hangman.client.actors.Console.Line

object Console {

  case class Line(line: String)

}

class Console extends Actor {
  var thread: Thread = null

  override def preStart(): Unit = {
    thread = new Thread(new Runnable {
      def run() {
        while (true) {
          val line: String = new Scanner(System.in).nextLine()
          context.system.eventStream.publish(Line(line))
        }
      }
    })
    thread.start()
  }

  override def postStop(): Unit = {
    thread.interrupt()
  }

  override def receive: Receive = {
    case _ =>
  }
} 

//设置package包名称以及导入依赖的类
package chehao.myscala

import java.util.Scanner

import scala.reflect.io.File
import scala.reflect.io.Path.string2path

object ScannerPrint {
  def main(args: Array[String]): Unit = {
      //object is like singleton object of a class defined implicitly.
      ScannerPrint.withScan(File("src/main/resources/scanfile.properties"),
        scanner => println("pid is " + scanner.next()))
      
      //throw exception
      ScannerPrint.withScan(File("src/main/resources/scanfile.properties"),
      scanner => log("pid is " + scanner.next() + 1/0))
      
      //call By Name  don't throw exception, , evaluate until execute 
      ScannerPrint.withScan(File("src/main/resources/scanfile.properties"),
      scanner => logByName("pid is " + scanner.next() + 1/0))
  }

  def withScan(f: File, op: Scanner => Unit) {
    val scanner = new Scanner(f.bufferedReader())
    try {
      op(scanner)
    } finally {
      scanner.close()
    }
  }
  val logEnable = false
  
  def log(msg:String) = if(logEnable) println(msg)
  //call by name
  def logByName(msg: =>String) = if(logEnable) println(msg)

} 

//设置package包名称以及导入依赖的类
package com.nekopiano.scala.scalasandbox.os

import java.io.File
import scalax.io.Resource
import scalax.io.Output
import java.util.Scanner
import java.nio.charset.Charset
import java.io.InputStreamReader


object FileExtract {

  val TARGET_PATHS = Seq(
    raw"bin\custom\samplecore\resources\samplecore-items.xml",
    raw"bin\custom\samplecore\src\jp\sample\y\core\jalo\AcmecoreManager.java",
    raw"bin\custom\sampleproductcockpit\resources\sampleproductcockpit\sampleproductcockpit-spring-services.xml",
    raw"bin\custom\sampleproductcockpit\resources\sampleproductcockpit\sampleproductcockpit-web-spring.xml",
    raw"bin\custom\sampleproductcockpit\src\jp\sample\y\productcockpit\services\meta\impl\ProductReferenceSpecNotePropertyValueHandler.java",
    raw"bin\custom\sampleproductcockpit\src\jp\sample\y\productcockpit\services\meta\impl\SpecNotePropertyValueHandler.java",
    raw"bin\custom\sampleproductcockpit\src\jp\sample\y\productcockpit\session\editor\AttributeSpecNoteUIEditor.java",
    raw"bin\custom\sampleproductcockpit\src\jp\sample\y\productcockpit\session\editor\RichTextSpecNoteUIEditor.java",
    raw"bin\custom\sampleproductcockpit\src\jp\sample\y\productcockpit\session\editor\SectionSpecNoteUIEditor.java",
    raw"bin\custom\sampleproductcockpit\src\jp\sample\y\productcockpit\session\editor\SpecNoteUIEditor.java",
    raw"bin\custom\sampleproductcockpit\src\jp\sample\y\productcockpit\session\impl\AcmeNewItemSection.java")

  def main(args: Array[String]): Unit = {
    System.out.println("Enter a String and press enter.");
    val scan = new Scanner(System.in, "MS932")
    System.out.println("Please enter the absolute path to copy files from.")
    val dirPath = scan.nextLine
    println("dirPath=" + dirPath)

    val files = getFileTree(new File(dirPath)).filter(_.isFile)

    println("files.size=" + files.size)

    val targetFiles = files.map(file =>
      {
        val absoluthPath = file.getAbsolutePath
        TARGET_PATHS.collectFirst { case targetPath if (absoluthPath.contains(targetPath)) => file }
      }).collect { case Some(file) => file }

    println("targetFiles.size=" + targetFiles.size)

    targetFiles foreach (file =>
      {
        val absoluthPath = file.getAbsolutePath
        println("file=" + file)
        Resource.fromFile(file) copyDataTo Resource.fromFile("extracted/" + file.getName)
      })

    println("Finished.")
  }

  def getFileTree(f: File): Stream[File] =
    f #:: (if (f.isDirectory) f.listFiles().toStream.flatMap(getFileTree)
    else Stream.empty)

} 

//设置package包名称以及导入依赖的类
package com.nekopiano.scala.scalasandbox.os

import java.io.File
import scalax.io.Resource
import scalax.io.Output
import java.util.Scanner
import java.nio.charset.Charset
import java.io.InputStreamReader


object FileSearch {

  val FOLDER_PATH = "C:\\Repos\\AcmeDocsRepo\\git\\datamig\\registeringbinarydata_130807"

  def main(args: Array[String]): Unit = {

    System.out.println("Enter a String and press enter.");
    val scan = new Scanner(System.in, "MS932")
    System.out.println("Please enter the absolute path to search files from.")
    val dirPath = scan.nextLine
    println("dirPath=" + dirPath)

    //http://stackoverflow.com/questions/2637643/how-do-i-list-all-files-in-a-subdirectory-in-scala
    val files = getFileTree(new File(dirPath)).filter(_.isFile)

    println("files.size=" + files.size)

    files foreach { file =>
      {
        println(file)
        Resource.fromFile(file) copyDataTo Resource.fromFile("medias/" + file.getName)
        // val storingFile = new File("medias/" + file.getName)
        //        val output: Output = Resource.fromFile("medias/" + file.getName)
        //        output.write(file)
      }
    }

    println("Finished.")
  }

  def getFileTree(f: File): Stream[File] =
    f #:: (if (f.isDirectory) f.listFiles().toStream.flatMap(getFileTree)
    else Stream.empty)

} 

//设置package包名称以及导入依赖的类
package com.nekopiano.scala.sandbox.os

import java.util.Scanner


object InputEncodingTest {

  def main(args: Array[String]): Unit = {
    // val scan = new Scanner(System.in, "UTF8")
    val scan = new Scanner(System.in)
    System.out.println("Please enter a string.")
    val input = scan.nextLine
    print(input)
    def print(input: String) {
      println("input=" + input)
      println("%04X".format(input.charAt(0).toInt))
      println("UTF8=" + input.getBytes("UTF8").mkString)
      println("MS932=" + input.getBytes("MS932").mkString)
      println("UTF16=" + input.getBytes("UTF16").mkString)
    }
    //print("?")

  }

} 

//设置package包名称以及导入依赖的类
package edu.knowitall.common.main

import java.util.Scanner

import edu.knowitall.common.Timing.time


abstract class LineProcessor {
  def init(args: Array[String]) {}
  def exit(ns: Long) {}
  def process(line: String): String
  def main(args: Array[String]) {
    init(args)
    val scanner = new Scanner(System.in, "UTF-8")

    val condition =
      if (args.length > 0 && args.contains("-i")) () => true
      else () => scanner.hasNextLine

    val ns = time {
      while (condition()) {
        println(process(scanner.nextLine))
      }
    }

    exit(ns)
  }
} 

//设置package包名称以及导入依赖的类
package se.lth.immun.diana

import java.util.Scanner
import java.io.File
import scala.collection.mutable.ArrayBuffer


class ReadRegression {
  val regressions = new ArrayBuffer[RegressionParams]

  def readRegFile(name: String) {
    val fileReader = new Scanner(new File(name))
    while (fileReader.hasNext()) {
      val line = fileReader.nextLine()

      val splitData = line.split("\\)")
      val min = splitData(0).charAt(splitData(0).length - 1)-'0'
      val max = splitData(1).charAt(splitData(1).length - 1)-'0'
      val detect = splitData(2).charAt(splitData(2).length - 1)-'0'
      val filter = splitData(3).charAt(splitData(3).length - 1)-'0'
      val rep = splitData(4).charAt(splitData(4).length - 1)-'0'
      val ifTemplate = splitData(5).charAt(splitData(5).length - 1)-'0'
      val corrLim = (splitData(6).split("\\(")(1)).toDouble
      val regParams = splitData(7).drop(2).split(" ").map { x => x.toDouble }

      regressions += new RegressionParams(min, max, detect, filter, rep, ifTemplate, corrLim, 1, regParams)
    }
  }
  def estimatePeaks(features: PeptideFeatures, regParams: RegressionParams): Int = {
    return (features.average * regParams.regressionParams(0) + features.lowpassaverage * regParams.regressionParams(1) + features.fakelowpassaverage * regParams.regressionParams(2) + features.max * regParams.regressionParams(3) + features.median * regParams.regressionParams(4) + features.numberOfChanges * regParams.regressionParams(5) + features.variance * regParams.regressionParams(6)).toInt

  }
} 

//设置package包名称以及导入依赖的类
package com.husaft.photofriend.cmd

import java.util.Scanner
import com.flickr4java.flickr._
import com.flickr4java.flickr.auth._
import org.scribe.model._
import java.awt.Desktop
import java.net.URI
import com.typesafe.config.ConfigFactory

object AuthIt {

  def doAuth(api: Flickr): Auth = {
    val authIntf = api.getAuthInterface

    val prefix = "Auth.";
    val conf = ConfigFactory.load();
    val token = conf.getString(prefix + "token")
    val secret = conf.getString(prefix + "secret");

    var requestToken: Token = null

    if (token.isEmpty()) {
      val scanner = new Scanner(System.in)
      val token = authIntf.getRequestToken()
      val url = authIntf.getAuthorizationUrl(token, Permission.DELETE)
      Desktop.getDesktop.browse(URI.create(url))
      println("Paste in the token it gives you:")
      print(">>")
      val tokenKey = scanner.nextLine()
      scanner.close()
      requestToken = authIntf.getAccessToken(token, new Verifier(tokenKey))
      println("Authentication success")
    } else {
      requestToken = new Token(token, secret)
    }

    val auth = authIntf.checkToken(requestToken)
    println(" Token: " + requestToken.getToken());
    println(" Secret: " + requestToken.getSecret());
    println(" Id: " + auth.getUser().getId())
    println(" Realname: " + auth.getUser().getRealName())
    println(" Username: " + auth.getUser().getUsername())
    println(" Permission: " + auth.getPermission().getType())

    auth
  }
}