baseoperation.java

简单的计算器程序

package calculate.operations;

import calculate.Calculate;
import calculate.Operation;

public class BaseOperation implements Operation {

	private String baseOperation = null;

	public BaseOperation(String baseOperation) {
		this.baseOperation = baseOperation;
	}
	
	public String getBaseOperation() {
		return baseOperation;
	}

	public void execute(Calculate calculate) {
		if (!"".equals(calculate.getLastInput()) && OPERATIONS.indexOf(calculate.getLastInput()) < 0) {
			calculate.doCalculate();
		}
		
		calculate.setLastOperation(this.getBaseOperation());
	}
}