在Java中，fillInStackTrace()是Throwable类中的一个重要方法。堆栈跟踪可以帮助确定异常的确切抛出位置。在某些情况下，我们可能需要重新抛出异常并找出它被重新抛出的位置，我们可以在这种情况下使用fillInStackTrace()方法。
语法
public Throwable fillInStackTrace()
Example
的中文翻译为：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) 
