testexception2.java

关于异常的一些算法；都是很金典的例子

import com.kettas.common.*;
import java.io.*;
import java.sql.*;
public class TestException2{
	public static void main(String args[]){
		int n = SystemIn.readInt();
		System.out.println("main 1");
		int s = ma(n);
		System.out.println(s);
		System.out.println("main 2");
	}
	static int ma(int n) {
		try{
			System.out.println("ma 1");
			mb(n);
			System.out.println("ma 2");
			//return 10;
		}
		catch(SQLException e){
			System.out.println("Catch a SQL Exception");
			System.out.println( e.getMessage() );
			e.printStackTrace();
			//return 5;
		}
		catch(IOException e){
			System.out.println("Catch a IO Exception");
			//return 5;
		}
		catch(Exception e){
			System.out.println("Catch an Exception");
			//return 5;
		}
		finally{
			System.out.println("In Finally");
			return 3;
		}
	}
	static void mb(int n) throws IOException,SQLException{
		System.out.println("mb 1");
		mc(n);
		System.out.println("mb 2");
	}
	static void mc(int n) throws FileNotFoundException,EOFException,SQLException{
		System.out.println("mc 1");
		if (n == 0) throw new NullPointerException("KongZhiZhen");
		if (n == 1) throw new EOFException("End Of File");
		if (n == 2) throw new FileNotFoundException("File Not Found");
		if (n == 3) throw new SQLException( "Database Exception" );
		System.out.println("mc 2");
	}
}