Java 异常处理（二）

public class Main{
    public static void main (String args[]){
        int array[]={20,20,40};
        int num1=15,num2=10;
        int result=10;
        try{
            result = num1/num2;
            System.out.println("The result is" +result);
            for(int i =5; i>=0; i--) {
                System.out.println("The value of array is" +array[i]);
            }
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}

The result is1
java.lang.ArrayIndexOutOfBoundsException: 5
        at testapp.Main.main(Main.java:28)

public class Main {
    double method(int i) throws Exception{
        return i/0;
    }
    boolean method(boolean b) {
        return !b;
    }
    static double method(int x, double y) throws Exception  {
        return x + y ;
    }
    static double method(double x, double y) {
        return x + y - 3;
    }   
    public static void main(String[] args) {
        Main mn = new Main();
        try{
            System.out.println(method(10, 20.0));
            System.out.println(method(10.0, 20));
            System.out.println(method(10.0, 20.0));
            System.out.println(mn.method(10));
        }
        catch (Exception ex){
            System.out.println("exception occoure: "+ ex);
        }
    }
}

30.0
27.0
27.0
exception occoure: java.lang.ArithmeticException: / by zero

public class Main {
    public static void main (String args[])throws Exception  {
        int n=20,result=0;
        try{
            result=n/0;
            System.out.println("结果为"+result);
        }
        catch(ArithmeticException ex){
            System.out.println("发算术异常: "+ex);
            try {
                throw new NumberFormatException();
            }
            catch(NumberFormatException ex1) {
                System.out.println("手动抛出链试异常 : "+ex1);
            }
        }
    }
}

发算术异常: java.lang.ArithmeticException: / by zero
手动抛出链试异常 : java.lang.NumberFormatException

class WrongInputException extends Exception {  // 自定义的类
    WrongInputException(String s) {
        super(s);
    }
}
class Input {
    void method() throws WrongInputException {
        throw new WrongInputException("Wrong input"); // 抛出自定义的类
    }
}
class TestInput {
    public static void main(String[] args){
        try {
            new Input().method();
        }
        catch(WrongInputException wie) {
            System.out.println(wie.getMessage());
        }
    } 
}

Wrong input