Design suitable data structures and implement pass-I of a two-pass assembler for pseudo-machine in Java using object oriented feature. Implementation should consist of a few instructions from each category and few assembler directives.

INSTtable.java

import java.util.HashMap;

public class INSTtable {

	HashMap<String, Integer> AD,RG,IS,CC,DL;
	public INSTtable()
	{
		AD=new HashMap<>();
		CC = new HashMap<>();
		IS = new HashMap<>();
		RG = new HashMap<>();
		DL=new HashMap<String, Integer>();
		DL.put("DC", 01);
		DL.put("DS", 02);
		IS.put("STOP",0);
		IS.put("ADD",1);
		IS.put("SUB",2);
		IS.put("MULT",3);
		IS.put("MOVER",4);
		IS.put("MOVEM",5);
		IS.put("COMP",6);
		IS.put("BC",7);
		IS.put("DIV",8);
		IS.put("READ",9);
		IS.put("PRINT",10);
		CC.put("LT",1);
		CC.put("LE",2);
		CC.put("EQ",3);
		CC.put("GT",4);
		CC.put("GE",5);
		CC.put("ANY",6);
		AD.put("START",1);
		AD.put("END",2);
		AD.put("ORIGIN",3);
		AD.put("EQU",4);
		AD.put("LTORG",5);
		RG.put("AREG",1);
		RG.put("BREG",2);
		RG.put("CREG",3);
		RG.put("DREG",4);
		
	}
	public String getType(String s)
	{
		s=s.toUpperCase();
		if(AD.containsKey(s))
			return "AD";
		else if(IS.containsKey(s))
			return "IS";
		else if(CC.containsKey(s))
			return "CC";
		else if(DL.containsKey(s))
			return "DL";
		else if(RG.containsKey(s))
			return "RG";
		return "";
		
	}
	
	public int getCode(String s)
	{
		s = s.toUpperCase();
		if(AD.containsKey(s))
			return AD.get(s);
		else if(IS.containsKey(s))
			return IS.get(s);
		else if(CC.containsKey(s))
			return CC.get(s);
		else if(DL.containsKey(s))
			return DL.get(s);
		else if(RG.containsKey(s))
			return RG.get(s);
		return -1;
	}
	
}

TableRow.java

public class TableRow {
String symbol;
int addess,index;
public String getSymbol() {
	return symbol;
}
public TableRow(String symbol, int addess) {
	super();
	this.symbol = symbol;
	this.addess = addess;
	index=0;
}
public void setSymbol(String symbol) {
	this.symbol = symbol;
}
public TableRow(String symbol, int addess, int index) {
	super();
	this.symbol = symbol;
	this.addess = addess;
	this.index = index;
}
public int getAddess() {
	return addess;
}
public void setAddess(int addess) {
	this.addess = addess;
}
public int getIndex() {
	return index;
}
public void setIndex(int index) {
	this.index = index;
}
}