Java中的可抛出 getMessage() 方法及示例
Throwable 类的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()