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    Ennead 类是从元组JavaTuples。由于此Ennead 是一个泛型类,因此它可以包含任何类型的值。由于Ennead 是一个元组,因此它也具有JavaTuples的所有特征:

    • Typesafe
    • 永恒的
    • 可迭代
    • Serializable
    • Comparable(实现Comparable <Tuple>)
    • 实现equals()hashCode()
    • 实现toString()

    Ennead 类声明

    public final class Ennead<A, B, C, D, E, F, G, H, I>
    extends Tuple
    implements IValue0<A>, IValue1<B>, IValue2<C>, IValue3<D>, IValue4<E>, 
               IValue5<F, IValue6<G, IValue7<H>, IValue8<I>

    Ennead 类层次结构

    Object
      ↳ org.javatuples.Tuple
          ↳ org.javatuples.Ennead<A, B, C, D, E, F, G, H, I>

    创造Ennead元组

    • 来自构造函数语法
      Ennead<A, B, C, D, E, F, G, H, I> ennead = 
          new Ennead<A, B, C, D, E, F, G, H, I>
              (value1, value2, value3, value4, value5, value6, value7, value8, value9);

      示例

      // Below is a Java program to create
      // a Ennead tuple from Constructor
      
      import java.util.*;
      import org.javatuples.Ennead;
      
      class GfG {
          public static void main(String[] args)
          {
              Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                  = Ennead.with(Integer.valueOf(1),
                                Integer.valueOf(2),
                                Integer.valueOf(3),
                                Integer.valueOf(4),
                                Integer.valueOf(5),
                                Integer.valueOf(6),
                                Integer.valueOf(7),
                                Integer.valueOf(8),
                                Integer.valueOf(9));
      
              System.out.println(ennead);
          }
      }
      

      输出:

      [1,2,3,4,5,6,7,8,9]
      
    • 使用with()方法:with()方法是JavaTuples库提供的函数,用于使用这些值实例化对象。语法
      Ennead <type1,type2,type3,type4,type5,type6,type7,type8> ennead = 
          Ennead.with(value1,value2,value3,value4,value5,value6,value7,value8,value9);
      

      示例

      // Below is a Java program to create
      // a Ennead tuple from with() method
      
      import java.util.*;
      import org.javatuples.Ennead;
      
      class GfG {
          public static void main(String[] args)
          {
              Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                  = Ennead.with(Integer.valueOf(1),
                                Integer.valueOf(2),
                                Integer.valueOf(3),
                                Integer.valueOf(4),
                                Integer.valueOf(5),
                                Integer.valueOf(6),
                                Integer.valueOf(7),
                                Integer.valueOf(8),
                                Integer.valueOf(9));
      
              System.out.println(ennead);
          }
      }
      

      输出:

      [1,2,3,4,5,6,7,8,9]
      
    • 来自其他集合:fromCollection()方法用于从集合创建元组,而fromArray()方法用于从数组创建。集合/数组必须与Tuple具有相同的类型,并且集合/数组中的值的数量必须与Tuple类匹配。语法
      Ennead <type1,type2,type3,type4,type5,type6,type7,type8> ennead = 
          Ennead.fromCollection(collectionWith_9_value);
      
      Ennead <type1,type2,type3,type4,type5,type6,type7,type8> ennead = 
          Ennead.fromArray(arrayWith_9_value);
      

      示例

      // Below is a Java program to create
      // a Ennead tuple from Collection
      
      import java.util.*;
      import org.javatuples.Ennead;
      
      class GfG {
          public static void main(String[] args)
          {
              // Creating Ennead from List
              List<Integer> list = new ArrayList<Integer>();
              list.add(1);
              list.add(2);
              list.add(3);
              list.add(4);
              list.add(5);
              list.add(6);
              list.add(7);
              list.add(8);
              list.add(9);
      
              Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                  = Ennead.fromCollection(list);
      
              // Creating Ennead from Array
              Integer[] arr = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
      
              Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> otherEnnead
                  = Ennead.fromArray(arr);
      
              System.out.println(ennead);
              System.out.println(otherEnnead);
          }
      }
      

      输出:

      [1,2,3,4,5,6,7,8,9]
      [1,2,3,4,5,6,7,8,9]
      

    获得Ennead的值

    getValueX()方法可用于获取索引X处的元组中的值。元组中的索引从0开始。因此索引X处的值表示位置X + 1处的值。

    语法

    Ennead <type1,type2,type3,type4,type5,type6,type7,type8> ennead = 
        new Ennead <type1,type2,type3,type4,type5,type6,type7,type8>
            (value1,value2,value3,value4,value5,value6,value7,value8,value9);
    
    type1 val1 = ennead.getValue0();
    

    示例

    // Below is a Java program to get
    // a Ennead value
    
    import java.util.*;
    import org.javatuples.Ennead;
    
    class GfG {
        public static void main(String[] args)
        {
            Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                = Ennead.with(Integer.valueOf(1),
                              Integer.valueOf(2),
                              Integer.valueOf(3),
                              Integer.valueOf(4),
                              Integer.valueOf(5),
                              Integer.valueOf(6),
                              Integer.valueOf(7),
                              Integer.valueOf(8),
                              Integer.valueOf(9));
    
            System.out.println(ennead.getValue0());
            System.out.println(ennead.getValue2());
        }
    }
    

    输出:

    1
    3
    

    设置Ennead值

    由于元组是不可变的,这意味着无法修改任何索引处的值。
    因此,JavaTuples提供setAtX(value),它在索引X处创建一个带有新值的元组副本,并返回该元组。

    句法:

    Ennead <type1,type2,type3,type4,type5,type6,type7,type8> ennead = 
        new Ennead <type1,type2,type3,type4,type5,type6,type7,type8>
                    (value1,value2,value3,value4,value5,value6,value7,value8,value9);
    
    Ennead <type1,type2,type3,type4,type5,type6,type7,type8> 
        otherEnnead = ennead.setAtX(value);
    

    例:

    // Below is a Java program to set
    // a Ennead value
    
    import java.util.*;
    import org.javatuples.Ennead;
    
    class GfG {
        public static void main(String[] args)
        {
            Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                = Ennead.with(Integer.valueOf(1),
                              Integer.valueOf(2),
                              Integer.valueOf(3),
                              Integer.valueOf(4),
                              Integer.valueOf(5),
                              Integer.valueOf(6),
                              Integer.valueOf(7),
                              Integer.valueOf(8),
                              Integer.valueOf(9));
    
            Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> otherEnnead
                = ennead.setAt3(40);
    
            System.out.println(otherEnnead);
        }
    }
    

    输出:

    [1,2,3,40,5,6,7,8,9]
    

    添加Ennead的值

    可以在addAtX()方法的帮助下添加值,其中X表示要添加值的索引。此方法返回元素的元组,比被调用的元组多一个。

    语法

    Ennead<type1, type2, type3, type4, type5, type6, type7, type8> ennead = 
        new Ennead<type1, type2, type3, type4, type5, type6, type7, type8>
            (value1, value2, value3, value4, value5, value6, value7, value8, value9);
    
    Ennead<type 1, type 2, type 3, type 4, type 5, type 6, type 7, type 8> ennead = 
        ennead.addAtx(value);

    示例

    // Below is a Java program to add
    // a value
    
    import java.util.*;
    import org.javatuples.Ennead;
    import org.javatuples.Decade;
    
    class GfG {
        public static void main(String[] args)
        {
            Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                = Ennead.with(Integer.valueOf(1),
                              Integer.valueOf(2),
                              Integer.valueOf(3),
                              Integer.valueOf(4),
                              Integer.valueOf(5),
                              Integer.valueOf(6),
                              Integer.valueOf(7),
                              Integer.valueOf(8),
                              Integer.valueOf(9));
    
            Decade<Integer, Integer, Integer, Integer, Integer, Integer.Integer, Integer, Integer, Integer, Integer> ennead
                = ennead.addAt9(10);
    
            System.out.println(ennead);
        }
    }
    

    输出:

    [1,2,3,4,5,6,7,8,9,10]
    

    在Ennead中搜索

    可以使用预定义的方法contains()在元组中搜索元素。无论值是否存在,它都返回一个布尔值。

    语法

    Ennead <type1,type2,type3,type4,type5,type6,type7,type8> ennead = 
        new Ennead <type1,type2,type3,type4,type5,type6,type7,type8>
            (value1,value2,value3,value4,value5,value6,value7,value8,value9);
    
    boolean res = ennead.contains(value2);
    

    示例

    // Below is a Java program to search
    // a value in a Ennead
    
    import java.util.*;
    import org.javatuples.Ennead;
    
    class GfG {
        public static void main(String[] args)
        {
            Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                = Ennead.with(Integer.valueOf(1),
                              Integer.valueOf(2),
                              Integer.valueOf(3),
                              Integer.valueOf(4),
                              Integer.valueOf(5),
                              Integer.valueOf(6),
                              Integer.valueOf(7),
                              Integer.valueOf(8),
                              Integer.valueOf(9));
    
            boolean exist = ennead.contains(5);
            boolean exist1 = ennead.contains(false);
    
            System.out.println(exist);
            System.out.println(exist1);
        }
    }
    

    输出:

    true
    false
    

    通过Ennead迭代

    由于Ennead实现了Iterable <Object>接口。这意味着它们可以以与集合或数组相同的方式进行迭代。

    语法

    Ennead <type1,type2,type3,type4,type5,type6,type7,type8> ennead = 
        new Ennead <type1,type2,type3,type4,type5,type6,type7,type8>
                (value1,value2,value3,value4,value5,value6,value7,value8,value9);
    
    for(Object item:ennead){
            ...
    }
    

    示例

    // Below is a Java program to iterate
    // a Ennead
    
    import java.util.*;
    import org.javatuples.Ennead;
    
    class GfG {
        public static void main(String[] args)
        {
            Ennead<Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer, Integer> ennead
                = Ennead.with(Integer.valueOf(1),
                              Integer.valueOf(2),
                              Integer.valueOf(3),
                              Integer.valueOf(4),
                              Integer.valueOf(5),
                              Integer.valueOf(6),
                              Integer.valueOf(7),
                              Integer.valueOf(8),
                              Integer.valueOf(9));
    
            for (Object item : ennead)
                System.out.println(item);
        }
    }
    

    输出:

    1
    2
    3
    4
    5
    6
    7
    8
    9

     
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