Guava Chars類

Chars是基本char類型的實用工具類

類聲明

以下是com.google.common.primitives.Chars類的聲明：

@GwtCompatible(emulated=true)
? ?public final class Chars
? ? ? extends Object

字段

方法

方法繼承

這個類從以下類繼承的方法： java.lang.Object

Chars 例子

選擇使用任何編輯器創建以下java程序在 C:/> Guava
GuavaTester.java

import java.util.List;
import com.google.common.primitives.Chars;

public class GuavaTester {
   public static void main(String args[]){
      GuavaTester tester = new GuavaTester();
      tester.testChars();
   }

   private void testChars(){
      char[] charArray = {'a','b','c','d','e','f','g','h'};

      //convert array of primitives to array of objects
      List<Character> objectArray = Chars.asList(charArray);
      System.out.println(objectArray.toString());

      //convert array of objects to array of primitives
      charArray = Chars.toArray(objectArray);
      System.out.print("[ ");
      for(int i = 0; i< charArray.length ; i++){
         System.out.print(charArray[i] + " ");
      }
      System.out.println("]");
      //check if element is present in the list of primitives or not
      System.out.println("c is in list? "+ Chars.contains(charArray, 'c'));

      //return the index of element
      System.out.println("c position in list "+ Chars.indexOf(charArray, 'c'));

      //Returns the minimum		
      System.out.println("Min: " + Chars.min(charArray));

      //Returns the maximum		
      System.out.println("Max: " + Chars.max(charArray));	
   }
}

驗證結果

使用javac編譯器編譯如下類

C:\Guava>javac GuavaTester.java

現在運行GuavaTester看到的結果

C:\Guava>java GuavaTester

看到結果

[a, b, c, d, e, f, g, h]
[ a b c d e f g h ]
c is in list? true
c position in list 2
Min: a
Max: h

 

 

 

 

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