Random Number Generator without repetition using java

import java.util.*;

class ran

{

public static void main(String args[])

{

int cnter=0;

Random ran=new Random();

int x;

int y;

// int z;

int counter;

int sto[]=new int[50];

int ref[]=new int[50];

label1:

while(cnter<=49)

{

sto[cnter]=ran.nextInt(50);

x=cnter;

counter=0;

for(y=0;y<=x;y++)

{

if(sto[x]!=ref[y] && counter==0)

{

ref[x]=sto[x];

counter++;

}/// IF CLOSE

else

{

if(sto[x]==ref[y] && y!=cnter)

{

continue label1;

}

else if(sto[x]==ref[y] && y==cnter)

{

ref[x]=sto[x];

}

}//ELSE CLOSE

}///for loop close

cnter++;

//System.out.println(cnter);

}

for(int c=0;c<=49;c++)

{

System.out.println("Ranodm Number Is:"+ref[c]);

}

}

}