javathrows.java

java经典10例子

import java.lang.*;

public class JavaThrows{
	public void calc(byte k) throws Exception{//抛出异常
		byte  y=1,i=1;
		System.out.print(k+"!=");
		//求整数的阶乘，一旦计算后的数值大于某个值，则认为"溢出"
		for (i=1;i<=k;i++){
			if(i*y>Byte.MAX_VALUE)
				throw new Exception("溢出");
			else
				y = (byte)(y * i);
		}
		System.out.println(y);
	}
	
	public void run(byte k){//捕获并处理异常
		try{
			calc(k);
		}catch(Exception e){
			System.out.println("异常: "+e.getMessage());
			e.printStackTrace();
			System.exit(0);
		}
	}
	
	public static void main (String args[]){
		JavaThrows a = new JavaThrows();
		for (byte i=1;i<10;i++)
			a.run(i);
	}
}