Guava Chars类

Chars是一个用于原始类型char的实用类。

类声明

以下是声明的内容 com.google.common.primitives.Chars 类−

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

字段

方法

继承的方法

该类继承以下类的方法：

• java.lang.Object

Chars类示例

使用任意编辑器创建以下Java程序，保存在C:/> Guava中。

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));   
   }
}

验证结果

使用 javac 编译器编译类如下：

C:\Guava>javac GuavaTester.java

现在运行GuavaTester以查看结果。

C:\Guava>java GuavaTester

查看结果。

[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