新手了解java 异常处理基础知识

public class Demo{
    public void test(){
        //此代码声明这里会抛出一个运行时异常
       throw new RutimeException();
    }
}
public class DemoTest{
    public static void main(String[] args){
       Demo demo = new Demo()
           demo.test();
    }
}

try {
// 可能发生异常的代码块
} catch (/* 需要捕获的异常类 */) {
// 捕获到异常后的处理代码块
} finally {
// 不管是否会发生异常，此代码块都会被执行
}

public class Demo1{
    public static void main(String[] args){
        String[] strs = {"张三","李四","王五"};
        try {
            System.out.println("-------");
            System.out.println(strs[3]); // 此处会发生异常，当异常发生后，后面的代码都不会被执行到
                for (String str : strs) {
                    System.out.println(str);
                }
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println("++++++++++");
        } catch (Exception e) {
            System.out.println("++++++++++");
        }finally{
            System.out.println("--------------");
        }
    }
}

public class Demo{
    public void test() throws Exception{
        //此代码声明这里会抛出一个异常
       throw new Exception();
    }
}
public class DemoTest{
    public static void main(String[] args){
       Demo demo = new Demo()
         try {
           demo.test();
         }catch (Exception e) {
            System.out.println("++++++++++");
        }finally{
            System.out.println("--------------");
        }
    }
}

public class MyRutimeException extends RutimeException {
    public MyRutimeException(String message){
        super(message);
    }
}

public class MyException extends Exception {
    public MyException(String message){
        super(message);
    }
}