Java Throwable getLocalizedMessage()用法及代碼示例

Throwable類的getLocalizedMessage()方法用於在發生異常時獲取Throwable對象的locale-specific描述。它有助於我們根據本地特定消息修改Throwable對象的描述。對於不覆蓋此方法的子類，此方法的默認實現返回與getMessage()相同的結果。

用法:

public String getLocalizedMessage()

返回值：發生異常時，此方法返回Throwable對象的locale-specific描述。

下麵的程序演示了Throwable類的getLocalizedMessage()方法：

示例1:

// Java program to demonstrate 
// the getLocalizedMessage() Method. 
  
import java.io.*; 
  
class GFG { 
  
    // Main Method 
    public static void main(String[] args) 
        throws Exception 
    { 
  
        try { 
            // add the numbers 
            addPositiveNumbers(2, -1); 
        } 
        catch (Exception e) { 
            System.out.println("LocalizedMessage = "
                               + e.getLocalizedMessage()); 
        } 
    } 
  
    // method which adds two positive number 
    public static void addPositiveNumbers(int a, int b) 
        throws Exception 
    { 
  
        if (a < 0 || b < 0) { 
  
            throw new Exception("Numbers are not Positive"); 
        } 
        else { 
  
            System.out.println(a + b); 
        } 
    } 
}

輸出：

LocalizedMessage = Numbers are not Positive

示例2:

// Java program to demonstrate 
// the ensureCapacity() Method. 
  
import java.io.*; 
  
class GFG { 
  
    // Main Method 
    public static void main(String[] args) 
        throws Exception 
    { 
  
        try { 
            testException(); 
        } 
  
        catch (Throwable e) { 
            System.out.println("LocalizedMessage of Exception : "
                               + e.getLocalizedMessage()); 
        } 
    } 
  
    // method which throws IndexOutOfBoundsException 
    public static void testException() 
        throws IndexOutOfBoundsException 
    { 
  
        throw new IndexOutOfBoundsException( 
            "Forcefully Generated Exception"); 
    } 
}

輸出：

LocalizedMessage of Exception : Forcefully Generated Exception

參考文獻：
https://docs.oracle.com/javase/10/docs/api/java/lang/Throwable.html#getLocalizedMessage()

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