getbound.cs

这是学习java基础的好的源代码的学习资料

/*******
 * public int GetUpperBound(int dimension);
 * dimension是从0开始的维数，一维数组，dimension＝0，二维数组，dimension=1
 * GetUpperBound(0) 是 GetUpperBound 的一个示例，它返回 Array 的第一维的索引的上限，
 * 而 GetUpperBound(Rank - 1) 返回 Array 的最后一维的上限。
 * Rank是Array的秩（维数）
 */
using System;
namespace ConsoleApplication5
{
	public class SamplesArray  
	{

		public static void Main()  
		{

			// Creates a new one-dimensional Array of type Int32.
			Array my1DIntArray = Array.CreateInstance( typeof(Int32), 5 );

			// Uses GetLowerBound and GetUpperBound in the for loop.
			for ( int i = my1DIntArray.GetLowerBound(0); i <= my1DIntArray.GetUpperBound(0); i++ )
				my1DIntArray.SetValue( i+1, i );

			// Displays the bounds and values of the one-dimensional Array.
			Console.WriteLine( "One-dimensional Array:" );
			Console.WriteLine( "Rank\tLower\tUpper" );
			Console.WriteLine( "{0}\t{1}\t{2}", 0, my1DIntArray.GetLowerBound(0), my1DIntArray.GetUpperBound(0) );
			Console.WriteLine( "Values:" );
			PrintValues( my1DIntArray );
			Console.WriteLine();

			// Creates a new three-dimensional Array of type Int32.
			Array my3DIntArray = Array.CreateInstance( typeof(Int32), 2, 3, 4 );

			// Uses GetLowerBound and GetUpperBound
			for ( int i = my3DIntArray.GetLowerBound(0); i <= my3DIntArray.GetUpperBound(0); i++ )
				for ( int j = my3DIntArray.GetLowerBound(1); j <= my3DIntArray.GetUpperBound(1); j++ )
					for ( int k = my3DIntArray.GetLowerBound(2); k <= my3DIntArray.GetUpperBound(2); k++ )  
					{
						my3DIntArray.SetValue( (i*100)+(j*10)+k, i, j, k );
					}

			// Displays the bounds and values of the multidimensional Array.
			Console.WriteLine( "Multidimensional Array:" );
			Console.WriteLine( "Rank\tLower\tUpper" );
			for ( int i = 0; i < my3DIntArray.Rank; i++ )
				Console.WriteLine( "{0}\t{1}\t{2}", i, my3DIntArray.GetLowerBound(i), my3DIntArray.GetUpperBound(i) );
			Console.WriteLine( "Values:" );
			PrintValues( my3DIntArray );
		}


		public static void PrintValues( Array myArr )  
		{
			System.Collections.IEnumerator myEnumerator = myArr.GetEnumerator();
			int i = 0;
			int cols = myArr.GetLength( myArr.Rank - 1 ); //最后维的元素个数
			while ( myEnumerator.MoveNext() )  
			{
				if ( i < cols )  
				{
					i++;
				} 
				else  
				{
					Console.WriteLine();
					i = 1;
				}
				Console.Write( "\t{0}", myEnumerator.Current );
			}
			Console.WriteLine();
		}
	}

}