何时在 Java 中使用 fillInStackTrace() 方法?
javaobject oriented programmingprogramming更新于 2024/7/19 12:26:00
fillInStackTrace() 是 Java 中 Throwable 类的一个重要方法。堆栈跟踪可用于确定异常的确切抛出位置。在某些情况下，我们需要重新抛出异常并找出它重新抛出的位置，在这种情况下，我们可以使用fillInStackTrace() 方法。
语法
public Throwable fillInStackTrace()
示例
public class FillInStackTraceTest {
public static void method1() throws Exception {
throw new Exception("This is thrown from method1()");
}
public static void method2() throws Throwable {
try {
method1();
} catch(Exception e) {
System.err.println("Inside method2():");
e.printStackTrace();
throw e.fillInStackTrace(); // calling fillInStackTrace() method
}
}
public static void main(String[] args) throws Throwable {
try {
method2();
} catch (Exception e) {
System.err.println("Caught Inside Main method()");
e.printStackTrace();
}
}
}
输出
Inside method2(): java.lang.Exception: This is thrown from method1() at FillInStackTraceTest.method1(FillInStackTraceTest.java:3) at FillInStackTraceTest.method2(FillInStackTraceTest.java:7) at FillInStackTraceTest.main(FillInStackTraceTest.java:18) Caught Inside Main method() java.lang.Exception: This is thrown from method1() at FillInStackTraceTest.method2(FillInStackTraceTest.java:12) at FillInStackTraceTest.main(FillInStackTraceTest.java:18)
