下面java代码的输出为? import java.util.HashMap; import java.util.Iterator; public class Main { public static void main(String[] args) { HashMap map = new HashMap<Integer, Integer>(); map.put(1, "wangyi"); changeHashMap(map); for (Iterator it = map.keySet().iterator(); it.hasNext();) { Object key = it.next(); System.out.println(key + "=" + map.get(key)); } } static void changeHashMap(HashMap map) { map = new HashMap<Integer, String>(); map.put(1, "163"); } }
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下面java代码的输出为?
import java.util.HashMap; import java.util.Iterator; public class Main { public static void main(String[] args) { HashMap map = new HashMap<Integer, Integer>(); map.put(1, "wangyi"); changeHashMap(map); for (Iterator it = map.keySet().iterator(); it.hasNext();) { Object key = it.next(); System.out.println(key + "=" + map.get(key)); } } static void changeHashMap(HashMap map) { map = new HashMap<Integer, String>(); map.put(1, "163"); } }
java只有值传递,这里形参的map,实际只是main方法map内存地址的一份拷贝,但是在changeHashMap()方法里,给形参map用的是new HashMap(),所以是在堆内存里面新创建了一个map对象,和main方法里面创建的对象毫无关系。如果这里没有14行代码,则应该选B.
05:18
以上就是关于问题下面java代码的输出为? import java.util.HashMap; import java.util.Iterator; public class Main { public static void main(String[] args) { HashMap map = new HashMap<Integer, Integer>(); map.put(1, "wangyi"); changeHashMap(map); for (Iterator it = map.keySet().iterator(); it.hasNext();) { Object key = it.next(); System.out.println(key + "=" + map.get(key)); } } static void changeHashMap(HashMap map) { map = new HashMap<Integer, String>(); map.put(1, "163"); } }的答案
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qklbishe.com区块链毕设代做网专注|以太坊fabric-计算机|java|毕业设计|代做平台-javagopython毕设 » 下面java代码的输出为? import java.util.HashMap; import java.util.Iterator; public class Main { public static void main(String[] args) { HashMap map = new HashMap<Integer, Integer>(); map.put(1, "wangyi"); changeHashMap(map); for (Iterator it = map.keySet().iterator(); it.hasNext();) { Object key = it.next(); System.out.println(key + "=" + map.get(key)); } } static void changeHashMap(HashMap map) { map = new HashMap<Integer, String>(); map.put(1, "163"); } }
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具体资料介绍
web3的一级市场千万收益的逻辑
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qklbishe.com区块链毕设代做网专注|以太坊fabric-计算机|java|毕业设计|代做平台-javagopython毕设 » 下面java代码的输出为? import java.util.HashMap; import java.util.Iterator; public class Main { public static void main(String[] args) { HashMap map = new HashMap<Integer, Integer>(); map.put(1, "wangyi"); changeHashMap(map); for (Iterator it = map.keySet().iterator(); it.hasNext();) { Object key = it.next(); System.out.println(key + "=" + map.get(key)); } } static void changeHashMap(HashMap map) { map = new HashMap<Integer, String>(); map.put(1, "163"); } }
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qklbishe.com区块链毕设代做网专注|以太坊fabric-计算机|java|毕业设计|代做平台-javagopython毕设 » 下面java代码的输出为? import java.util.HashMap; import java.util.Iterator; public class Main { public static void main(String[] args) { HashMap map = new HashMap<Integer, Integer>(); map.put(1, "wangyi"); changeHashMap(map); for (Iterator it = map.keySet().iterator(); it.hasNext();) { Object key = it.next(); System.out.println(key + "=" + map.get(key)); } } static void changeHashMap(HashMap map) { map = new HashMap<Integer, String>(); map.put(1, "163"); } }
qklbishe.com区块链毕设代做网专注|以太坊fabric-计算机|java|毕业设计|代做平台-javagopython毕设 » 下面java代码的输出为? import java.util.HashMap; import java.util.Iterator; public class Main { public static void main(String[] args) { HashMap map = new HashMap<Integer, Integer>(); map.put(1, "wangyi"); changeHashMap(map); for (Iterator it = map.keySet().iterator(); it.hasNext();) { Object key = it.next(); System.out.println(key + "=" + map.get(key)); } } static void changeHashMap(HashMap map) { map = new HashMap<Integer, String>(); map.put(1, "163"); } }