Java 8语法迭代并基于所有元素的否定谓词调用方法？

Question

这是我在Java 7中所做的:

public class Sample {

    private List<String> list = Lists.newArrayList("helloworld", "foobar", "newyork");

    public void performOperation(String input) {

        boolean found = false;

        for (String each : list) {
            if (input.contains(each)) {
                found = true;
            }
        }

        if (!found) {
            magicMethod(input);
        }
    }

    public void magicMethod(String input) {
        // do the real magic here
    }
}

我希望沿着这条线走路(这显然是错误的)

list.forEach(each -> input.contains(each) ? magicMethod(input) : return );

Answer 1

在您的特定情况下使用anyMatch或noneMatch更清楚:

if (list.stream().noneMatch(input::contains)) {
   magicMethod(input);
}