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package w8; |
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import java.util.HashMap; |
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import java.util.Map; |
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public class Cache<K, V> { |
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private final Map<K, V> cache = new HashMap<>(); |
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// 存入缓存
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public void put(K key, V value) { |
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cache.put(key, value); |
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} |
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// 从缓存获取
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public V get(K key) { |
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return cache.get(key); |
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} |
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// 移除缓存
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public V remove(K key) { |
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return cache.remove(key); |
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} |
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// 清空缓存
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public void clear() { |
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cache.clear(); |
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} |
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// 判断是否包含key
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public boolean containsKey(K key) { |
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return cache.containsKey(key); |
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} |
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// 获取缓存大小
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public int size() { |
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return cache.size(); |
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} |
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// 测试
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public static void main(String[] args) { |
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Cache<String, Integer> studentScore = new Cache<>(); |
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studentScore.put("张三", 90); |
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studentScore.put("李四", 85); |
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System.out.println("张三的分数:" + studentScore.get("张三")); |
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System.out.println("缓存大小:" + studentScore.size()); |
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studentScore.remove("李四"); |
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System.out.println("移除李四后,缓存是否包含李四?" + studentScore.containsKey("李四")); |
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} |
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} |
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