Bubble Sort using Java

import java.io.*;
import java.lang.Math;
public class bubble
{
public static void main(String args[])
{
int []arr=new int[10];
int i,j,t,flag=1;
System.out.println("Array before sorting:");
for(i=0;i<arr.length;i++) {
arr[i]=(int)(Math.random()*100);
System.out.print(arr[i]);
System.out.print(" ");
}
System.out.println("");
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Compare each element adjacent to the current element and swap if required
-------------------------------------------------------------------------

for(i=0;i<arr.length && flag==1;i++) {
flag=0;
for(j=0;(j<arr.length-1);j++) {
if(arr[j+1]<arr[j]) {
t=arr[j];
arr[j]=arr[j+1];
arr[j+1]=t;
flag=1;
}
}
}
-------------------------------------------------------------------------
Display sorted array
-------------------------------------------------------------------------

System.out.println("Array after sorting:");
for(j=0;j<arr.length;j++) {

System.out.print(arr[j]);
System.out.print(" ");

}
System.out.println("");
}

}