我的 CSVHelper 中的 Java 代码错误

Question

I am using the CsvHelper library to read/write csv files from my excel. to implement K means clustering. When I run my main class there's an error (The type java.lang.CharSequence cannot be resolved. It is indirectly referenced from required .class files) in the code curVal.append((char)ch);

Answer 1

java.lang.CharSequence is part of Java since Java 1.4.

That error means that either your Java installation is missing its standard library, or it is older than 1.4 (released in 2002!)

Without further information, we cannot solve this for you, because it apparently is a problem local to your computer .