// Class for Name Table Structurepublic class PLobject {        public static final int constant = 0;    public static final int variable = 1;    public static final int PLprocedure = 2;    public String name;    public int kind;    public int val;    public int level, adr;    //for const    PLobject(String s, int k) {    	name = s;    	kind = k;    }    //for var    PLobject(String s, int k, int v) {	    this(s, k);	    val = v;    }    //for procedure    PLobject(String s, int k, int l, int a) {	    this(s, k);	    level = l;	    adr = a;    }}