24 lines
651 B
Java
24 lines
651 B
Java
package chapter6;
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import java.util.Iterator;
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import java.util.Set;
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import java.util.TreeMap;
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public class Example19 {
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public static void main(String[] args) {
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TreeMap map = new TreeMap(); // 创建Map集合
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map.put(3, "李四"); // 存储键和值
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map.put(2, "王五");
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map.put(4, "赵六");
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map.put(3, "张三");
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Set keySet = map.keySet();
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Iterator iterator = keySet.iterator();
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while (iterator.hasNext()) {
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Object key = iterator.next();
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Object value = map.get(key);
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System.out.println(key + ":" + value);
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}
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}
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}
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