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Java Throwable getMessage()用法及代码示例


Throwable类的getMessage()方法用于返回Throwable对象的详细消息,该消息也可以为null。可以使用此方法将异常的详细消息作为字符串值获取。

用法:

public String getMessage()

返回值:此方法返回此Throwable实例的详细消息。


下面的程序演示java.lang.Throwable类的getMessage()方法

示例1:

// Java program to demonstrate 
// the getMessage() Method. 
  
import java.io.*; 
  
class GFG { 
  
    // Main Method 
    public static void main(String[] args) 
        throws Exception 
    { 
  
        try { 
  
            // divide the numbers 
            divide(2, 0); 
        } 
  
        catch (ArithmeticException e) { 
  
            System.out.println("Message String = "
                               + e.getMessage()); 
        } 
    } 
  
    // method which divide two numbers 
    public static void divide(int a, int b) 
        throws ArithmeticException 
    { 
  
        int c = a / b; 
  
        System.out.println("Result:" + c); 
    } 
}
输出:
Message String = / by zero

示例2:

// Java program to demonstrate 
// the getMessage() Method. 
  
import java.io.*; 
  
class GFG { 
  
    // Main Method 
    public static void main(String[] args) 
        throws Exception 
    { 
  
        try { 
  
            test(); 
        } 
  
        catch (Throwable e) { 
  
            System.out.println("Message of Exception : "
                               + e.getMessage()); 
        } 
    } 
  
    // method which throws UnsupportedOperationException 
    public static void test() 
        throws UnsupportedOperationException 
    { 
  
        throw new UnsupportedOperationException(); 
    } 
}
输出:
Message of Exception : null

参考文献:
https://docs.oracle.com/javase/10/docs/api/java/lang/Throwable.html#getMessage()



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注:本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 Throwable getMessage() 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。