antioperation.java

简单的计算器程序

package calculate.operations;

import calculate.Calculate;
import calculate.Operation;

public class AntiOperation implements Operation {

	public void execute(Calculate calculate) {
		String showText = calculate.getShowText();
		
		double value = Double.parseDouble(showText);
		
		if (value == 0) {
			calculate.setShowText(Calculate.ERROR_DIVIDE_ZERO);
		}
		
		calculate.setShowText((1 / value) + "");
	}

}