09 Exception Handling

import java.util.Scanner;  
  
public class Main {  
  
    private static void foo() {  
        int[] array = new int[5];  
        for (int i = 0; i < 5; i ++ )  
            array[i] = i;  
  
        Scanner sc = new Scanner(System.in);  
        int k = sc.nextInt();  
        int x = sc.nextInt();  
  
        try {  
            array[k] /= x;  
        } catch (ArithmeticException e) {  
            System.out.println("除零错误！");  
            // The API prints error details: / by zero            System.out.println(e.getMessage());  
            // The API prints the error stack trace  
            // Note: printing after catching does not terminate the program. Without a catch, the error is printed similarly, but the program terminates.  
            e.printStackTrace();  
        } catch (ArrayIndexOutOfBoundsException e) {  
            System.out.println("数组越界！");  
            e.printStackTrace();  
            // Code that runs whether or not an exception is caught can go in finally  
            // Even if catch contains return, finally runs before returning (statements after finally then do not run).  
        } finally {  
            for (int i = 0; i < 5; i ++ ) {  
                System.out.println(array[i]);  
            }  
        }  
//        System.out.println("程序执行完毕！");  
    }  
  
    public static void main(String[] args) {  
        foo();  
    }  
}

import java.io.IOException;  
import java.util.Scanner;  
  
public class Main {  
  
    // Declare multiple exceptions with throws  
    private static void foo() throws IOException, NoSuchFieldException {  
        Scanner sc = new Scanner(System.in);  
        int x = sc.nextInt();  
        if (x == 1)  
            throw new IOException("找不到文件！！！");  
        else            throw new NoSuchFieldException("自定义异常");  
    }  
  
    public static void main(String[] args) {  
        try {  
            // We throw an exception ourselves  
            foo();  
        } catch (IOException e) {  
            // Then we catch that exception ourselves  
            // Alternatively, main could throw it to the virtual machine  
            System.out.println("IOException!");  
            e.printStackTrace();  
        } catch (NoSuchFieldException e) {  
            System.out.println("NoSuchFieldException!");  
            e.printStackTrace();  
        }  
    }  
}

import java.io.*;  
  
public class Main {  
  
    public static void main(String[] args) {  
        String line;  
        try (  
                BufferedReader br = new BufferedReader(new FileReader("input.txt"));  
                BufferedWriter bw = new BufferedWriter(new FileWriter("output.txt"));  
        ) {  
            while ((line = br.readLine()) != null) {  
                System.out.println("Line => " + line);  
                bw.write("copy: " + line + "\n");  
            }  
            bw.flush();  
        } catch (IOException e) {  
            System.out.println("IOException in try block =>" + e.getMessage());  
        }  
    }  
}