if(radiobutton1.setselected(true))
{
jtable tabla1 = new jtable();
tabla1.visible();
}

if(radiobutton2.setselected(true))
{
jtable tabla2 = new jtable();
tabla2.visible();
}

if(radiobutton3.setselected(true))
{
jtable tabla3 = new jtable();
tabla3.visible();
}