grammartable.java

算术表达式的词法分析和语法分析,编译原理的实验

package Sentence;
//行列都是从一算起的。
public class GrammarTable {
	GrammarTable(int row,int col){
		columnCount = col;
		rowCount = row;
		data = new Object[rowCount+1][columnCount+1];
	}
	GrammarTable(int row,int col,Rule[] rul,String[] unf,String[] fin){
		columnCount = col;
		rowCount = row;
		data = new Object[rowCount+1][columnCount+1];
		rules = rul;
		unFinals = unf;
		finals = fin;
	}
	public void setRowName(String str,int num){
		data[num][0] = str;
	}
	public void setColumnName(String str,int num){
		data[0][num] = str;
	}
	public void setValueAt(Object obj,int row,int col){
		data[row][col] = obj;
	}
	public void setValueAt(Object obj,String rowName,String colName){
		int i,j;
		i = rowNameToNum(rowName);
		j = colNameToNum(colName);
		data[i][j] = obj;
	}
	public String getRowName(int num){
		String name = (String)data[num][0];
		return name;
	}
	public String getColumnName(int num){
		String name = (String)data[0][num];
		return name;
	}
	public Object getValueAt(int row,int col){
		Object item = data[row][col];
		return item;
	}
	public Object getValueAt(String rowName,String colName){
		int i,j;
		i = rowNameToNum(rowName);
		j = colNameToNum(colName);
		Object item = data[i][j];
		return item;
	}
	protected int rowNameToNum(String rowName){
		int i=1;
		for(int k=1;k<=rowCount;k++){
			if(rowName.compareTo(getRowName(k))==0){
				i=k;
				break;
			}
		}
		return i;
	}
	protected int colNameToNum(String colName){
		int i=1;
		for(int k=1;k<rowCount;k++){
			if(colName.compareTo(getColumnName(k))==0){
				i=k;
				break;
			}
		}
		return i;
	}
	protected int columnCount,rowCount;
	protected Object[][] data;
	protected Rule[] rules;
	protected String[] finals;
	protected String[] unFinals;
}