Question

我需要使用binaryOperator来实现一个apply方法，以便在两个双精度上执行数学过程，但是无法找到方法。我的代码的目的是一次对两个数字应用apply-method，每个数字来自它的相应迭代器。

我的编程时间太长了，所以我的代码可能会有很多错误，但这就是我现在已经走了多远：

package interfaces;

import java.util.Arrays;
import java.util.Iterator; 
import java.util.function.BinaryOperator;

public class BinaryComputingIterator implements Iterator<Double>, 
                                            BinaryOperator<Double>{
private BinaryOperator<Double> operator;

private Iterator<Double> iterator1;
private Iterator<Double> iterator2;
private Double default1;
private Double default2;

BinaryComputingIterator(Iterator<Double> iterator1, 
        Iterator<Double> iterator2, BinaryOperator<Double> operator){
    this.iterator1 = iterator1;
    this.iterator2 = iterator2;
    this.operator = operator;
}

BinaryComputingIterator(Iterator<Double> iterator1, 
        Iterator<Double> iterator2, Double default1, Double default2,
        BinaryOperator<Double> operator){
    this.iterator1 = iterator1;
    this.iterator2 = iterator2;
    this.operator = operator;
    this.default1 = default1;
    this.default2 = default2;
}

@Override
public boolean hasNext() {
    if (iterator1.hasNext() && iterator2.hasNext()){
        return true;
    }
    return false;
}

@Override
public Double next() {
    if (this.hasNext()){
        return this.next();
    }
    return null;
}

@Override

public Double apply(Double t, Double u) {
    return this.operator.apply(t, u);
}

}

Answer 1

您的if (!IsPostBack) { foreach (string header in headers) { XMLHeaders.Visible = true; rdHeaders.Items.Add(header); } }应该不实施Iterator。你的next（）方法应该实现为

BinaryOperator

这几乎应该涵盖它。

无法找到如何实现binaryOperator接口java

1 个答案: