example05_trycatchfinally.java

java课程设计教材上的程例题序代码

//本程序用来说明处理异常的一般方法，并验证try...catch...finally块的执行过程
package example;

public class Example05_TryCatchFinally
{
	public static void main(String[] args)
	{
		try
		{
			String nstr = "123a";
			System.out.println("The data is: " + nstr);
			
			int n = Integer.parseInt(nstr); //此语句可能会出现异常
			System.out.println("No exception in try block!");
		}
//		catch (NullPointerException e)
		catch (NumberFormatException e)
		{
			System.out.println("Exception in catch block: " + e.getMessage());
			
			throw new NumberFormatException();
		}
		finally
		{
			System.out.println("Now in finally block!");
		}
		
		System.out.println("after try - catch - finally structure!\n");
	}
}