MAP中保存的是String,写一个方法,把Map转换成String二维数组

Posted 2023-03-14

参考技术A 如果一下代码看不懂可以询问
Map<String,String> map = new HashMap<String, String>();
for (int i = 0; i < 5; i++)
map.put(""+i, "map"+i);

for (int i = 0; i < map.size(); i++)
System.out.println(map.get(""+i));

Set<String> set = map.keySet();
Iterator<String> it = set.iterator();
String[][] ss = new String[map.size()][2];
for (int i = 0; i < map.size(); i++)
ss[i][0] = it.next();
ss[i][1] = map.get(ss[i][0]);

for (int i = 0; i < ss.length; i++)
for (int j = 0; j < ss[i].length; j++)
System.out.print(ss[i][j]+"\t");

System.out.println();
本回答被提问者和网友采纳 参考技术B import java.util.HashMap;
import java.util.Map;
public class Test
public static void main(String[] args)
Map<String, String> map = new HashMap<String, String>();
map.put("key1", "value1");
map.put("key2", "value2");
map.put("key3", "value3");
map.put("key4", "value4");
String[][] twoDarray = new String[map.size()][2];
String[] keys = map.keySet().toArray(new String[map.size()]);
String[] values = map.values().toArray(new String[map.size()]);
for (int row = 0; row < twoDarray.length; row++)
twoDarray[row][0] = keys[row];
twoDarray[row][1] = values[row];

for (int i = 0; i < twoDarray.length; i++)
for (int j = 0; j < twoDarray[i].length; j++)
System.out.println(twoDarray[i][j]);



参考技术C 不知道你这个具体要求，