Switch[ENG].java

import java.util.*;
import java.util.concurrent.ThreadLocalRandom;

public class Switch {
    private static Scanner dd=new Scanner(System.in);
    public static void Switch1(String[] args) {
        int countX = 0,countGen = 0,i = 0;
        StringBuilder str=new StringBuilder();
        String st,str1,opt3;
        String check1 = "",check2="",check3="";
        int opt1 = 5,m = 0,rnd2,opt2;
        System.out.print("Insert full symbol: ");
        opt3=dd.next();
        char c = opt3.charAt(0);
        System.out.print("Insert empty symbol: ");
        opt3=dd.next();
        char p = opt3.charAt(0);
        while(true){
        System.out.print("Insert length line: ");
        opt1=dd.nextInt();
        if(opt1>=3){break;}}
        while(m<opt1){
            rnd2 = ThreadLocalRandom.current().nextInt(0,2);
            if(rnd2==1){str.append(p);}
            else if (rnd2==0){str.append(c);}
            m++;
        }
        st=str.toString();
        System.out.println(st);
        while(countX!=st.length()
                ){
            while(true){
                check1=check2=check3="";
                countX=0;
            System.out.print("Insert where change: ");
            opt2=dd.nextInt()-1;
            if(opt2>=0&opt2<=opt1){break;}}
            try{
            if(st.charAt(opt2-1)==c){check1=Character.toString(p);}
            else if(opt2!=0&st.charAt(opt2-1)==p){check1=Character.toString(c);}
            }catch(java.lang.StringIndexOutOfBoundsException exc){}
            try{
            if(st.charAt(opt2)==c){check2=Character.toString(p);}
            else if(st.charAt(opt2)==p){check2=Character.toString(c);}
            }catch(java.lang.StringIndexOutOfBoundsException exc){}
            try{
            if(opt2!=opt1-1&st.charAt(opt2+1)==c){check3=Character.toString(p);}
            else if(opt2!=opt1-1&st.charAt(opt2+1)==p){check3=Character.toString(c);}
            }catch(java.lang.StringIndexOutOfBoundsException exc){}
            if(opt2==0&opt2==opt1-1){str1=st.substring(0, opt2)+check1+check2+check3+st.substring(opt2+2, st.length()-1);}
            else if(opt2==0){str1=check2+check3+st.substring(opt2+2, st.length());}
            else if(opt2==opt1-1){str1=st.substring(0, opt2-1)+check1+check2+check3;}
            else if(opt2>2){str1=st.substring(0, opt2-1)+check1+check2+check3+st.substring(opt2+2, st.length());}
            else{str1=st.substring(0, opt2-1)+check1+check2+check3+st.substring(opt2+2, st.length());}
            System.out.println(str1);
            st=null;
            st=str1;
            while(true){
                if(i==str1.length()){break;}
                if(str1.charAt(i)==c){countX++;}
                i++;
            }
            System.out.println(c+" = "+countX+"       "+p+" = "+(str1.length()-countX));
        countGen++;
        i=0;
        }
        System.out.println("You won in  "+countGen+" moves!");
        dd.nextLine();dd.nextLine();
    }

    public static void main(String[] args) {
        while(true){for(int k=0;k<1000;k++){System.out.println();}Switch1(args);}
    }

}