Java LogRecord getThrown()用法及代碼示例

java.lang.reflect.LogRecord的getThrown()方法用於獲取與日誌事件關聯的throwable。這用於在logRecord中記錄可用於記錄消息的異常。

用法:

public Throwable getThrown()

參數：此方法不接受任何內容。

返回：此方法返回一個throwable。

以下示例程序旨在說明getThrown()方法：
示例1:

// Java program to illustrate 
// getThrown() method 
  
import java.io.IOException; 
import java.util.logging.Level; 
import java.util.logging.LogRecord; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Create LogRecord object 
        LogRecord logRecord 
            = new LogRecord(Level.INFO, 
                            "GFG Logger"); 
        logRecord.setThrown( 
            new IOException( 
                "Error in Input")); 
  
        // get Throwable object 
        Throwable throwObj 
            = logRecord.getThrown(); 
  
        // print result 
        System.out.println( 
            "throwable object = "
            + throwObj 
                  .toString()); 
    } 
}

輸出：

throwable object = java.io.IOException: Error in Input

示例2:

// Java program to illustrate 
// getThrown() method 
  
import java.util.logging.Level; 
import java.util.logging.LogRecord; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Create LogRecord object 
        LogRecord logRecord 
            = new LogRecord(Level.WARNING, 
                            "Logger"); 
        logRecord.setThrown( 
            new ArithmeticException()); 
  
        // get Throwable object 
        Throwable throwObj 
            = logRecord.getThrown(); 
  
        // print result 
        System.out.println( 
            "throwable object = "
            + throwObj 
                  .toString()); 
    } 
}

輸出：

throwable object = java.lang.ArithmeticException

參考文獻： https://docs.oracle.com/javase/10/docs/api/java/util/logging/LogRecord.html#getThrown()

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