s-day07- Predicate的and-or-negate方法介绍
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package com.inmind.funcitonal_predicate05;
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import java.util.function.Predicate;
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/*
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2.Predicate里面的and方法
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需求:对一个字符串,使用2个predicate,判断它是否以h开头,它的长度是否大于3
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分析:
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1.一个predicate要对字符串进行判断是否以h开头
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2.另一个predicate要对字符串进行判断它的长度是否大于3
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*/
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public class Demo10 {
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public static void main(String[] args) {
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method1(
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s->s.startsWith("h"),
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s->s.length()>3,
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"hello java"
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);
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}
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public static void method1(Predicate<String> predicate1, Predicate<String> predicate2, String s) {
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/*boolean result1 = predicate1.test(s);
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boolean result2 = predicate2.test(s);
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boolean result = result1 && result2;*/
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boolean result = predicate1.and(predicate2).test(s);
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System.out.println(result);
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}
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//需求:对一个字符串,使用2个predicate,判断它是否以h开头或者它的长度是否大于3
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public static void method2(Predicate<String> predicate1, Predicate<String> predicate2, String s) {
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/*boolean result1 = predicate1.test(s);
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boolean result2 = predicate2.test(s);
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boolean result = result1 || result2;*/
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boolean result = predicate1.or(predicate2).test(s);
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System.out.println(result);
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// boolean value = predicate1.negate().test(s);
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}
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}
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