Throw和Throws的区别和运用

Throw是自行抛出错误,并生成指定的异常对象.大家可以看下下面的代码:

    public static void main(String[] args) {
        // TODO 自动生成方法存根

        try
        {
            double d =90/0.0;
            System.out.println("浮点数除以0"+d);
            if(String.valueOf(d).equals("Infintiy"))
                throw new ArithmeticException("除0异常");
        }
        catch(ArithmeticException e)
        {
            System.out.println(e);
        }
        
    }

Throws:如果方法出现错误,但是无法处理异常,可以在方法声明处用Throws子句来声明抛出的异常.

    public static void main(String[] args) throws IOException{
        // TODO 自动生成方法存根

        BufferedReader buf;
        String str;
        while(true)
        {
            buf =new BufferedReader(new InputStreamReader(System.in));
            System.out.print("请输入数字");
            str =buf.readLine();
            try
            {
                Integer.valueOf(str);
                System.out.println("转型成功");
            }
            catch(Exception e)
            {
                System.out.println("转型失败!");
            }
        }
    }