operation.java

简单的计算器程序

package calculate;

public interface Operation {
	
	public static final String OPERATIONS = "+-*/=";
	
	public static final String ADD_OPERATION = "+";
	
	public static final String SUBSTRACT_OPERATION = "-";
	
	public static final String MULTIPLY_OPERATION = "*";
	
	public static final String DIVIDE_OPERATION = "/";

	public static final String POINT_OPERATION = ".";

	public static final String ADD_SUBSTRACT_OPERATION = "+/-";
	
	public void execute(Calculate calculate);
}