Java throws Keyword: Exception Handling Guide

In Java, the “throws” keyword is used to declare the exceptions that a method may throw. If a method may throw a checked exception, the “throws” keyword can be used to list these exceptions in the method declaration.

For example:

public void readFile(String fileName) throws IOException {
    // 读取文件的代码
}

In the example above, the readFile method may throw an IOException, so we use “throws IOException” to declare this possibility. This allows the caller to know which exceptions this method may throw, giving them the opportunity to handle these exceptions or pass them on to the caller’s method for processing.