Excpt.java

package excpt;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.lang.*;
import java.lang.reflect.*;
import java.net.*;
import java.util.ArrayList;
import java.util.ConcurrentModificationException;
import java.util.LinkedList;
import java.util.List;

/*
 * Наиболее полный список исключений
 * https://programming.guide/java/list-of-java-exceptions.html
 *
 * */


class MyEx extends IOException {
    private int a = 1;
    public int b = 2;

    public MyEx() {
    }

    public MyEx(String str) {
        super(str);
    }

    public void UserEx() throws MyEx {
        throw new MyEx("demo");
    }

}

public class Excpt {

    static MyEx me = new MyEx();

    public static void main(String[] args) throws UnknownHostException, IOException {

        SockEx();
        ClssNotF();
        UserEx();
        IllegAcss();
        NoSuchmet();
        FileNotFoundExceptionExample();
        ClassCastExceptionExample();
        InterruptedExceptionExample();
    }

    public static void SockEx() throws UnknownHostException, IOException {
        // InetAddress host = InetAddress.getLocalHost();
        InetAddress host = null;
        Socket socket = null;

        try {
            socket = new Socket(host.getHostName(), 9876);

        } catch (NullPointerException e) {
            System.out.println("���������� 1 ����������!");
            System.out.println(e.toString());
        }

    }

    public static void ClssNotF() {

        try {
            Class.forName("MyHiddenClass");

        } catch (ClassNotFoundException e) {
            System.out.println("���������� 2 ����������!");
            System.out.println(e.toString());
        }
    }

    public static void UserEx() {

        try {

            me.UserEx();

        } catch (MyEx e) {
            System.out.println("���������� 3 ����������!");
            System.out.println(e.toString());
        }
    }

    public static void IllegAcss() {

        try {

            Field[] fields = me.getClass().getDeclaredFields();
            for (Field field : fields) {
                /*
                 * if (Modifier.isPrivate(field.getModifiers())) { field.setAccessible(true);
                 * System.out.println(field.getName()+" : "+field.get(me)); }
                 */
                System.out.println(field.getName() + " : " + field.get(me));
            }

        } catch (IllegalAccessException e) {

            System.out.println("���������� 4 ����������!");
            System.out.println(e.toString());

        }

    }

    public static void NoSuchmet() {

        Method m = null;
        Class c = me.getClass();

        try {
            m = c.getMethod("jkjhg", null);

            System.out.println(m);

        } catch (NoSuchMethodException e) {
            System.out.println("���������� 5 ����������!");
            System.out.println(e.toString());
        }
    }

    public static void FileNotFoundExceptionExample() {
        try {
            var test = new FileReader("there_is_no_file.txt");
            /*such file does not exist*/
        } catch (FileNotFoundException e) {
            System.out.println("testing FileNotFoundException! #6");
            System.out.println(e.toString());
        }
    }

    public static void ClassCastExceptionExample() {
        try {
            List<String> list = new LinkedList<>();
            ArrayList<String> iDontGonnaWorkLol = (ArrayList<String>) list;
        } catch (ClassCastException e) {
            System.out.println("Broking class cast~ #7");
            System.out.println(e.toString());
        }
    }

    public static void InterruptedExceptionExample() {
        List<String> list = new LinkedList<>();
        list.add("a");
        list.add("b");
        list.add("c");
        try {
        for(String next: list)
            list.add("d");
        } catch(ConcurrentModificationException ex) {
            System.out.println("Concurrent Modification Exception testing #8");
            System.out.println(ex.toString());
        }
    }
}