operationbutton.java

JAVA 实现的一个计算器,是很好的学习教材,仅供新手,老鸟就不要看了

import java.awt.*;
public class OperationButton extends Button
{
	String operator=null;
	public OperationButton(String s)
	{
		super(s);
		operator=s;
		setForeground(Color.red);
	}
	public String getOperator()
	{
		return operator;
	}
}