📜  Java中的可抛出 getMessage() 方法及示例

📅  最后修改于: 2022-05-13 01:54:43.610000             🧑  作者: Mango

Java中的可抛出 getMessage() 方法及示例

Throwable 类getMessage()方法用于返回 Throwable 对象的详细消息,也可以为 null。可以使用此方法以字符串值的形式获取异常的详细消息。

句法:

public String getMessage()

返回值:该方法返回这个 Throwable 实例的详细信息

下面的程序演示了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:
https://docs.oracle.com/javase/10/docs/api/java Java()