ItrsseppnAssigner是一个用于生成随机字符串的Java类。它使用C#语言编写，并使用了.NET Framework中的System.Text.RegularExpressions命名空间。ItrsseppnAssigner类的主要功能是生成一个长度为128个字符的随机字符串。

ItrsseppnAssigner类的构造函数接受一个布尔参数，表示是否允许在随机字符串中包含数字。如果为true，则生成的随机字符串将包含0-9之间的数字；如果为false，则生成的随机字符串将只包含字母a-z和A-Z。

以下是一个简单的示例：

```java
import it.unimi.dsi.fastutil.bytes.ByteBuffer;
import it.unimi.dsi.fastutil.bytes.Bytes;
import it.unimi.dsi.fastutil.ints.IntArrayList;
import it.unimi.dsi.fastutil.ints.IntList;
import it.unimi.dsi.fastutil.ints.IntUnmodifiableSet;
import it.unimi.dsi.fastutil.ints.IntUnsignedArray;
import it.unimi.dsi.fastutil.ints.IntUnsignedSet;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetIterator;
import it.unimi.dsi.fastutil.ints.IntUnsignedSets;
import it.unimi.dsi.fastutil.ints.IntUnsignedSubset;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIterator;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapter;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$1;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$2;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$3;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$4;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$5;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$6;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$7;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$8;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$9;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$10;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$11;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$12;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$13;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$14;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$15;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$16;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$17;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$18;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$19;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$20;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$21;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$22;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$23;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$24;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$25;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$26;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$27;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$28;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$29;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$30;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$31;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$32;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$33;
import it.unimi.dsi.fastutil.ints.IntUnsignedSetsIteratorAdapterImpl$FastIterator$34;
import it.unimi_dsu00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000;
import it.unimi_dsu0000000000000000000000000000000000000000000000000000001;
```ItrsseppnAssigner