Throwable類setStackTrace()方法 (Throwable Class setStackTrace() method)

• setStackTrace() Method is available in java.lang package.

  setStackTrace()方法在java.lang包中可用。

• setStackTrace() Method is used to sets stack trace elements that will be retrieved by using getStackTrace() method.

  setStackTrace()方法用于設置將通過使用getStackTrace()方法檢索的堆棧跟蹤元素。

• setStackTrace() Method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  setStackTrace()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• setStackTrace() Method may throw an exception at the time of setting stack trace elements.

  setStackTrace()方法在設置堆棧跟蹤元素時可能會引發異常。

  NullPointerException – This exception may throw when the given argument is null or when any of its existing elements of the stack trace is null.

  NullPointerException-當給定參數為null或堆棧跟蹤的任何現有元素為null時，可能引發此異常。

Syntax:

句法：

    public void setStackTrace(StackTraceElement[] st_tr);

Parameter(s):

參數：

• StackTraceElement[] st_tr – represents an array of "StackTraceElement".

  StackTraceElement [] st_tr –表示“ StackTraceElement”的數組。

Return value:

返回值：

The return type of the method is void, it returns nothing.

該方法的返回類型為void ，不返回任何內容。

Example:

例：

// Java program to demonstrate the example 
// of void setStackTrace(StackTraceElement[] st_tr)
// method of Throwable 
public class SetStackTrace {
public static void main(String args[]) {
try {
stackTraceMethod();
} catch (Throwable ex) {
// By using getStackTrace() method is to get the
// stack trace element
StackTraceElement[] st_tr = ex.getStackTrace();
System.err.println("st_tr[0].toString()" + st_tr[0].toString());
}
}
public static void stackTraceMethod() throws Throwable {
int li_nu = 7;
// instantiate a new exception called 
// Throwable
Throwable th = new Throwable("Raise New Exception");
StackTraceElement[] st_tr = new StackTraceElement[] {
new StackTraceElement("cl_na", "me_na", "fu_na", li_nu)
};
// By using setStackTrace() method is to set
// the elements in stack
th.setStackTrace(st_tr);
throw th;
}
}

Output

輸出量

st_tr[0].toString()cl_na.me_na(fu_na:7)

翻譯自: https://www.includehelp.com/java/throwable-setstacktrace-method-with-example.aspx