java - 为什么 IllegalArgumentException (JDK 1.4.2) 不能用可抛出的原因构造？

Question

来自扩展 java.beans.PropertyEditorSupport 的类:

/**
 * Sets the property value by parsing a given String.  May raise
 * java.lang.IllegalArgumentException if either the String is
 * badly formatted or if this kind of property can't be expressed
 * as text.
 *
 * @param text  The string to be parsed.
 */
public void setAsText(String name) {
    try {
        asEnum(name);
    } catch (InvalidEnumNameException e) {
        throw new IllegalArgumentException("Unable to convert value: "+ name);
    }
}

将导致真实的堆栈跟踪丢失。

Answer 1

IllegalArgumentException does have constructors带有 Throwable cause 参数 - 该代码根本不使用它们，可能是因为它比“异常有一个 Throwable cause”约定，该约定是随 Java 5 引入的。