软工周作业
一、
1 public class EmbededFinally { 2 3 4 public static void main(String args[]) { 5 6 int result; 7 8 try { 9 10 System.out.println("in Level 1"); 11 12 13 try { 14 15 System.out.println("in Level 2"); 16 // result=100/0; //Level 2 17 18 try { 19 20 System.out.println("in Level 3"); 21 22 result=100/0; //Level 3 23 24 } 25 26 catch (Exception e) { 27 28 System.out.println("Level 3:" + e.getClass().toString()); 29 30 } 31 32 33 finally { 34 35 System.out.println("In Level 3 finally"); 36 37 } 38 39 40 // result=100/0; //Level 2 41 42 43 } 44 45 catch (Exception e) { 46 47 System.out.println("Level 2:" + e.getClass().toString()); 48 49 } 50 finally { 51 52 System.out.println("In Level 2 finally"); 53 54 } 55 56 // result = 100 / 0; //level 1 57 58 } 59 60 catch (Exception e) { 61 62 System.out.println("Level 1:" + e.getClass().toString()); 63 64 } 65 66 finally { 67 68 . System.out.println("In Level 1 finally"); 69 70 } 71 72 } 73 74 }
运行结果
表达式错误：0被当作了除数
二、
源码
1 public class EmbededFinally { 2 3 4 public static void main(String args[]) { 5 6 int result; 7 8 try { 9 10 System.out.println("in Level 1"); 11 12 13 try { 14 15 System.out.println("in Level 2"); 16 // result=100/0; //Level 2 17 18 try { 19 20 System.out.println("in Level 3"); 21 22 result=100/0; //Level 3 23 24 } 25 26 catch (Exception e) { 27 28 System.out.println("Level 3:" + e.getClass().toString()); 29 30 } 31 32 33 finally { 34 35 System.out.println("In Level 3 finally"); 36 37 } 38 39 40 // result=100/0; //Level 2 41 42 43 } 44 45 catch (Exception e) { 46 47 System.out.println("Level 2:" + e.getClass().toString()); 48 49 } 50 finally { 51 52 System.out.println("In Level 2 finally"); 53 54 } 55 56 // result = 100 / 0; //level 1 57 58 } 59 60 catch (Exception e) { 61 62 System.out.println("Level 1:" + e.getClass().toString()); 63 64 } 65 66 finally { 67 68 . System.out.println("In Level 1 finally"); 69 70 } 71 72 } 73 74 }
运行结果
三、
源码
1 public class CatchWho2 { 2 public static void main(String[] args) { 3 try { 4 try { 5 throw new ArrayIndexOutOfBoundsException(); 6 } 7 catch(ArithmeticException e) { 8 System.out.println( "ArrayIndexOutOfBoundsException" + "/内层try-catch"); 9 } 10 throw new ArithmeticException(); 11 } 12 catch(ArithmeticException e) { 13 System.out.println("发生ArithmeticException"); 14 } 15 catch(ArrayIndexOutOfBoundsException e) { 16 System.out.println( "ArrayIndexOutOfBoundsException" + "/外层try-catch"); 17 } 18 } 19 }
运行结果
四、
源码
1 public class EmbededFinally { 2 3 4 public static void main(String args[]) { 5 6 int result; 7 8 try { 9 10 System.out.println("in Level 1"); 11 12 13 try { 14 15 System.out.println("in Level 2"); 16 // result=100/0; //Level 2 17 18 try { 19 20 System.out.println("in Level 3"); 21 22 result=100/0; //Level 3 23 24 } 25 26 catch (Exception e) { 27 28 System.out.println("Level 3:" + e.getClass().toString()); 29 30 } 31 32 33 finally { 34 35 System.out.println("In Level 3 finally"); 36 37 } 38 39 40 // result=100/0; //Level 2 41 42 43 } 44 45 catch (Exception e) { 46 47 System.out.println("Level 2:" + e.getClass().toString()); 48 49 } 50 finally { 51 52 System.out.println("In Level 2 finally"); 53 54 } 55 56 // result = 100 / 0; //level 1 57 58 } 59 60 catch (Exception e) { 61 62 System.out.println("Level 1:" + e.getClass().toString()); 63 64 } 65 66 finally { 67 68 System.out.println("In Level 1 finally"); 69 70 } 71 72 } 73 74 }
运行结果
五、
源码
1 public class SystemExitAndFinally { 2 3 4 public static void main(String[] args) 5 { 6 7 try{ 8 9 10 System.out.println("in main"); 11 12 throw new Exception("Exception is thrown in main"); 13 14 //System.exit(0); 15 16 17 } 18 19 catch(Exception e) 20 21 { 22 23 System.out.println(e.getMessage()); 24 25 System.exit(0); 26 27 } 28 29 finally 30 31 { 32 33 System.out.println("in finally"); 34 35 } 36 37 } 38 39 40 }
运行结果
