2024年10月30日
RuntimeException (Java SE 22 & JDK 22) 示例。
您将在大多数 RuntimeException 方法中找到代码示例。
注解 :
- 本文可能使用了翻译软件以方便阅读。 另请查看英文原文。
简介
RuntimeException 是 Java 虚拟机正常运行期间可能抛出的异常的超类。 (机器翻译)
Code examples on this page uses the SampleRuntimeException class below.
@SuppressWarnings("serial")
public class SampleRuntimeException extends RuntimeException {
public SampleRuntimeException() {
}
public SampleRuntimeException(String message) {
super(message);
}
public SampleRuntimeException(String message, Throwable cause) {
super(message, cause);
}
public SampleRuntimeException(Throwable cause) {
super(cause);
}
public SampleRuntimeException(String message, Throwable cause,
boolean enableSuppression,
boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
}
public class Main {
public static void main(String[] args) {
try {
func1();
} catch (SampleRuntimeException ex) {
final RuntimeException e = ex;
e.printStackTrace();
// Result
// ↓
//SampleRuntimeException
// at Main.func2 ...
// at Main.func1 ...
// at Main.main ...
// ...
}
}
private static void func1() {
func2();
}
private static void func2() {
throw new SampleRuntimeException();
}
}
Constructors
RuntimeException ()
构造一个新的运行时异常，其详细消息为 null。 (机器翻译)
final RuntimeException e = new SampleRuntimeException();
System.out.println(e); // SampleRuntimeException
RuntimeException (String message)
使用指定的详细消息构造一个新的运行时异常。 (机器翻译)
final RuntimeException e = new SampleRuntimeException("abcde");
System.out.println(e); // SampleRuntimeException: abcde
System.out.println(e.getMessage()); // abcde
RuntimeException (String message, Throwable cause)
使用指定的详细消息和原因构造一个新的运行时异常。 (机器翻译)
final RuntimeException cause = new SampleRuntimeException("XYZ");
final RuntimeException e = new SampleRuntimeException("abcde", cause);
System.out.println(e); // SampleRuntimeException: abcde
System.out.println(e.getMessage()); // abcde
System.out.println(e.getCause()); // SampleRuntimeException: XYZ
System.out.println(e.getCause().getMessage()); // XYZ
RuntimeException (String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace)
构造一个新的运行时异常，并指定详细消息、原因、启用或禁用抑制以及启用或禁用可写堆栈跟踪。 (机器翻译)
final RuntimeException cause = new SampleRuntimeException("XYZ");
final RuntimeException e = new SampleRuntimeException("abcde", cause, true, true);
System.out.println(e); // SampleRuntimeException: abcde
System.out.println(e.getCause()); // SampleRuntimeException: XYZ
e.addSuppressed(new SampleRuntimeException("E1"));
e.addSuppressed(new SampleRuntimeException("E2"));
// [SampleRuntimeException: E1, SampleRuntimeException: E2]
System.out.println(Arrays.toString(e.getSuppressed()));
System.out.println(e.getStackTrace().length > 0); // true
// enableSuppression = false
final RuntimeException cause = new SampleRuntimeException("XYZ");
final RuntimeException e = new SampleRuntimeException("abcde", cause, false, true);
System.out.println(e); // SampleRuntimeException: abcde
System.out.println(e.getCause()); // SampleRuntimeException: XYZ
e.addSuppressed(new SampleRuntimeException("E1"));
e.addSuppressed(new SampleRuntimeException("E2"));
System.out.println(Arrays.toString(e.getSuppressed())); // []
System.out.println(e.getStackTrace().length > 0); // true
// writableStackTrace = false
final RuntimeException cause = new SampleRuntimeException("XYZ");
final RuntimeException e = new SampleRuntimeException("abcde", cause, true, false);
System.out.println(e); // SampleRuntimeException: abcde
System.out.println(e.getCause()); // SampleRuntimeException: XYZ
e.addSuppressed(new SampleRuntimeException("E1"));
e.addSuppressed(new SampleRuntimeException("E2"));
// [SampleRuntimeException: E1, SampleRuntimeException: E2]
System.out.println(Arrays.toString(e.getSuppressed()));
System.out.println(e.getStackTrace().length); // 0
RuntimeException (Throwable cause)
使用指定的原因和详细消息（cause==null ? null : cause.toString()）（通常包含原因的类和详细消息）构造一个新的运行时异常。 (机器翻译)
final RuntimeException cause = new SampleRuntimeException("XYZ");
final RuntimeException e = new SampleRuntimeException(cause);
System.out.println(e); // SampleRuntimeException: SampleRuntimeException: XYZ
System.out.println(e.getMessage()); // SampleRuntimeException: XYZ
System.out.println(e.getCause()); // SampleRuntimeException: XYZ
System.out.println(e.getCause().getMessage()); // XYZ
Methods declared in Throwable
addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
请参阅下面的链接。