带有示例的Java中的可抛出 setStackTrace() 方法

Throwable 类的setStackTrace(StackTraceElement[] stackTrace)方法用于将堆栈跟踪元素设置为该可抛出对象，该堆栈跟踪将由 getStackTrace() 返回并由 printStackTrace() 和相关方法打印。此方法允许用户覆盖默认堆栈跟踪，该堆栈跟踪要么在构造 throwable 时由 fillInStackTrace() 生成，要么在从序列化流中读取 throwable 时反序列化。
如果任何 Throwable 的堆栈跟踪不可写，则调用此方法除了验证其参数外没有任何效果。
句法：

public void 
    setStackTrace(StackTraceElement[] stackTrace)

参数：此方法只接受一个参数stackTrace ，它是与此 Throwable 关联的堆栈跟踪元素。
返回：此方法不返回任何内容。
下面的程序说明了 setStackTrace() 方法：
示例 1：

Java

// Java program to demonstrate
// the setStackTrace () Method.
 
import java.io.*;
 
class GFG {
 
    // Main Method
    public static void main(String[] args)
        throws Exception
    {
 
        try {
 
            testException1();
        }
 
        catch (Throwable e) {
 
            // access to the stack trace
            StackTraceElement[] trace = e.getStackTrace();
 
            System.out.println(trace[0].toString());
        }
    }
 
    // method which throws Exception
    public static void testException1()
        throws Exception
    {
 
        // create a new Exception
        Exception ex = new Exception();
 
        StackTraceElement[] trace = new StackTraceElement[] {
            new StackTraceElement("ClassNameOfExe",
                                  "methodNameOfExe",
                                  "fileNameOfExe",
                                  10)
        };
 
        // sets the stack trace elements
        ex.setStackTrace(trace);
 
        // throw the Throwable[
        throw ex;
    }
}

输出：

ClassNameOfExe.methodNameOfExe(fileNameOfExe:10)

示例 2：

Java

// Java program to demonstrate
// the setStackTrace () Method.
 
import java.io.*;
 
class GFG {
 
    // Main Method
    public static void main(String[] args)
        throws Exception
    {
 
        try {
 
            Exceptiontest();
        }
 
        catch (Throwable e) {
 
            // access to the stack trace
            StackTraceElement[] trace = e.getStackTrace();
 
            System.out.println("StackTraceElement length :"
                               + trace.length);
 
            for (int i = 0; i < trace.length; i++) {
 
                System.out.println("Stack Trace at index "
                                   + i + " : "
                                   + trace[i]);
            }
        }
    }
 
    // method which throws Exception
    public static void Exceptiontest()
        throws Exception
    {
 
        // create a new Exception
        ArrayStoreException ex = new ArrayStoreException();
 
        StackTraceElement[] trace = new StackTraceElement[] {
            new StackTraceElement("ClassName1", "methodName1",
                                  "fileName1", 10),
            new StackTraceElement("ClassName2", "methodName2",
                                  "fileName2", 20),
            new StackTraceElement("ClassName3", "methodName3",
                                  "fileName3", 14)
        };
 
        // sets the stack trace elements
        ex.setStackTrace(trace);
 
        throw ex;
    }
}

输出：

StackTraceElement length :3
Stack Trace at index 0 : ClassName1.methodName1(fileName1:10)
Stack Trace at index 1 : ClassName2.methodName2(fileName2:20)
Stack Trace at index 2 : ClassName3.methodName3(fileName3:14)

参考：
https://docs.oracle.com/javase/10/docs/api/java Java Java%5B%5D)