C#中new String()构造函数

最新推荐文章于 2025-07-15 16:14:57 发布

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#string #c# #character

本文通过一个 C# 示例介绍了如何创建并操作 Unicode 字符串，包括希腊字母的使用、字符串拼接及字符位置查找等基本操作。

static void Main()
{
        // Create a Unicode String with 5 Greek Alpha characters
        String szGreekAlpha = new String('/u0319', 5);
        // Create a Unicode String with a Greek Omega character
        String szGreekOmega1 = new String(new char[] { '/u03A9', '/u03A9', '/u03A9' });
        String szGreekOmega = new String(new char[] { '/u03A9', '/u03A9', '/u03A9' }, 2, 1);

        String szGreekLetters = String.Concat(szGreekOmega, szGreekAlpha, szGreekOmega.Clone());
        Console.WriteLine(szGreekAlpha);
        Console.WriteLine(szGreekOmega1);
        Console.WriteLine(szGreekOmega);
        // Examine the result
        Console.WriteLine(szGreekLetters);

        // The first index of Alpha
        int ialpha = szGreekLetters.IndexOf('/u0319');
        // The last index of Omega
        int iomega = szGreekLetters.LastIndexOf('/u03A9');

Console.WriteLine("The Greek letter Alpha first appears at index " + ialpha +
" and Omega last appears at index " + iomega + " in this String.");
}

结果:

?????

ΩΩΩ

Ω?????Ω

The Greek letter Alpha first appears at index 1 and Omega last appears at index
6 in this String.