How are exceptions defined in Java?

1 year ago
Liam
1 minute

In Java, exceptions can be defined in two ways:

  1. Outlier
  2. An anomaly
  3. Anomaly
public class CustomException extends Exception {
    // 自定义属性和方法

    @Override
    public String getMessage() {
        // 重写getMessage()方法
        return "自定义异常信息";
    }
}
  1. Something that can be thrown.
  2. Something that can be thrown or tossed.
public class CustomException implements Throwable {
    // 实现接口中的方法
}

When using custom exceptions, you can throw an exception object using the throw keyword, for example:

public void someMethod() throws CustomException {
    // 抛出自定义异常
    throw new CustomException();
}

When calling this method, any exceptions that occur can be caught and handled using a try-catch block. For example:

try {
    someMethod();
} catch (CustomException e) {
    // 处理异常
    e.printStackTrace();
}
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