sss

public void update()
{
 String[] oslist2 = new String[3];

 oslist2[0]="";
 oslist2[1]="";
 oslist2[2]="";
 oslist2[3]="";

 if (button1.isSelected()==true)
 {
     oslist2[0]="Windows";
 }
 else if(button1.isSelected()==false)
 {
     oslist2[0]="";
 }
 if (button2.isSelected()==true)
 {
     oslist2[1]="Linux";
 }
 else if(button2.isSelected()==false)
 {
     oslist2[1]="";
 }
 if (button3.isSelected()==true)
 {
     oslist2[2]="Mac";
 }
 else if(button3.isSelected()==false)
 {
     oslist2[2]="";
 }
 if (button4.isSelected()==true)
 {
     oslist2[3]="Unix";
 }
 else if(button4.isSelected()==false)
 {
     oslist2[3]="";
 }

String value ="";
for (int j = 0; j <= oslist2.length; j++)
{
     value += oslist2[j];
}



label.setText("You have selected the following OS': " + value);

}