28 lines
769 B
Java
28 lines
769 B
Java
package chapter6;
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import java.util.HashMap;
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public class Example14 {
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public static void main(String[] args) {
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HashMap map = new HashMap(); // 创建Map对象
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map.put("1","张三");//存储键和值
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map.put("2","李四");
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map.put("3","王五");
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map.put("3", "赵六");
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System.out.println("1：" + map.get("1")); // 根据键获取值
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System.out.println("2: " + map.get("2"));
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System.out.println("3: " + map.get("3"));
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System.out.println("键值对数量：" + map.size());
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// if (map.containsKey("1")) {
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// System.out.println("1号存在");
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// }
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//
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// if (map.containsValue("李四")) {
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// System.out.println("李四存在");
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// }
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}
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}
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