Java Throwable setStackTrace()用法及代码示例

Throwable类的setStackTrace(StackTraceElement [] stackTrace)方法用于将堆栈跟踪元素设置为此可抛出对象，并且该堆栈跟踪将由getStackTrace()返回并由printStackTrace()和相关方法打印。使用此方法，用户可以覆盖默认的堆栈跟踪，该默认堆栈跟踪在构造throwable时由fillInStackTrace()生成，或者在从序列化流中读取throwable时反序列化。
如果任何Throwable的堆栈跟踪均不可写，则调用此方法除了验证其参数外没有其他作用。

用法:

public void 
    setStackTrace(StackTraceElement[] stackTrace)

参数：此方法仅接受一个参数stackTrace，这是与此Throwable关联的堆栈跟踪元素。

返回值：此方法不返回任何结果。

以下示例程序旨在说明setStackTrace()方法：

示例1:

// 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 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)

参考文献：

相关用法

注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 Throwable setStackTrace() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。