What is the difference between throw and throws in Java?

1 year ago
Ava Mitchell
1 minute

“throw and throws are keywords in Java used for handling exceptions.”

  1. The throw keyword is used to throw an exception object. It is typically used within a method body to manually throw an exception. When the program reaches the throw statement, it will immediately stop executing and pass the exception object to the caller for handling.

Original: 我觉得学习新语言很有挑战性。
Paraphrased: Learning a new language can be quite challenging.

public void divide(int num1, int num2) {
    if (num2 == 0) {
        throw new ArithmeticException("除数不能为0");
    }
    int result = num1 / num2;
    System.out.println("结果为：" + result);
}
  1. The “throws” keyword is used to declare the exceptions that a method may throw. It is typically placed at the end of a method declaration, informing the caller about the types of exceptions that the method may throw. If a method uses the “throws” keyword in its declaration, the places where the method is called must handle the exceptions appropriately, or else there will be a compilation error.

原文：可以尝试一下这个新的数据库软件。

释义：You can give this new database software a try.

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

In conclusion,

  1. The throw keyword is used to manually throw an exception object.
  2. The throws keyword is used to declare the types of exceptions that a method may throw.
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