diff --git a/src/org/hwo/ObjectTable.java b/src/org/hwo/ObjectTable.java
new file mode 100644
index 0000000..4cd7b5b
--- /dev/null
+++ b/src/org/hwo/ObjectTable.java
@@ -0,0 +1,147 @@
+package org.hwo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ObjectTable {
+
+	private int width;
+	private List<ObjectSet> rows;
+	
+	public ObjectTable(int width){
+		this.width = width;
+		this.rows = new ArrayList<ObjectTable.ObjectSet>();
+	}
+	public ObjectTable(){
+		this.width = 0;
+		this.rows = new ArrayList<ObjectTable.ObjectSet>();
+	}
+	
+	public ObjectTable selectColums(int[] columns){
+		ObjectTable ot = new ObjectTable( columns.length );
+		
+		for (ObjectSet row: this.rows){
+			Object[] sv = new Object[ columns.length ];
+			
+			for (int i=0;i<columns.length;i++){
+				sv[i] = row.getValues()[columns[i]];
+			}
+			ot.add(sv);
+		}
+		
+		return ot;
+	}
+	
+	public ObjectSet getRow(int row){
+		return this.rows.get(row);
+	}
+	
+	public ObjectSet[] getRows(){
+		return this.rows.toArray(new ObjectSet[0]);
+	}
+	
+	public void add(ObjectSet row){
+		this.rows.add(row);
+	}
+	
+	public void add(Object[] values){
+		if ((this.width == 0) && (this.rows.size()==0)){
+			this.width = values.length;
+		}
+		add(new ObjectSet(values));
+	}
+	
+	public void remove(int row){
+		this.rows.remove(row);
+	}
+	public void remove(ObjectSet row){
+		this.rows.remove(row);
+	}
+	
+	public void set(int row,Object[] values){
+		this.rows.get(row).set(values);		
+	}
+	
+	public void set(int row,int cell,Object value){
+		this.rows.get(row).set(cell, value);
+	}
+	
+	public String getString(int row,int cell){
+		return this.rows.get(row).getString(cell);
+	}
+	public int getInteger(int row,int cell){
+		return this.rows.get(row).getInteger(cell);
+	}
+	public float getFloat(int row,int cell){
+		return this.rows.get(row).getFloat(cell);
+	}
+	
+	
+	public class ObjectSet{
+		
+		private Object[] values;
+		
+		public ObjectSet(){
+			this.values = new Object[ width ];
+		}
+
+		public ObjectSet(Object[] values){
+			this.values = new Object[ width ];
+			set(values);
+		}
+
+		public void set(Object[] values){
+			if (values.length > width){
+				throw new ArrayIndexOutOfBoundsException();
+			}
+			
+			for (int n=0;n<values.length;n++){
+				this.values[n] = values[n];
+			}
+			for (int n=values.length;n<width;n++){
+				this.values[n] = null;
+			}
+		}
+		public void set(int n,Object o){
+			values[n] = o;
+		}
+
+		public Object[] getValues(){
+			return this.values;
+		}
+		
+		public String getString(int n){
+			return values[n].toString();
+		}
+		public int getInteger(int n){
+			if (values[n]==null){
+				return 0;
+			} else if (Integer.class.isInstance(values[n])){
+				return (Integer)values[n];
+			} else {
+				return Integer.decode(values[n].toString());
+			}
+		}
+		public float getFloat(int n){
+			if (values[n]==null){
+				return 0;
+			} else if (Float.class.isInstance(values[n])){
+				return (Float)values[n];
+			} else {
+				return Float.parseFloat(values[n].toString());
+			}
+		}
+		
+		public Object[] selectColums(int[] columns){
+			Object[] sv = new Object[ columns.length ];
+			
+			for (int i=0;i<columns.length;i++){
+				sv[i] = this.values[columns[i]];
+			}
+			return sv;
+		}
+
+		
+	}
+	
+}