JAVA_把二维数组(Array)转换成 Map

来源：互联网发布：格式化u盘恢复数据编辑：程序博客网时间：2024/06/05 08:14

1.把二维数组(Array)转换成 Map

/* * 把 二维数组(Array)转换成 Map*/import java.util.Map;   import org.apache.commons.lang.ArrayUtils;      public class ArrayToMap {     public static void main(String[] args) {       String[][] countries = { { "United States", "New York" }, { "United Kingdom", "London" },           { "Netherland", "Amsterdam" }, { "Japan", "Tokyo" }, { "France", "Paris" } };        //循环遍历数组中的每个元素      for (int i = 0; i < countries.length; i++) {                  for (int j = 0; j < countries[i].length; j++) {                               System.out.print((String)countries[i][j]);                System.out.print(" ");//输出空格                //将数组中的元素输出              }              System.out.println();//回车，转入下一行                                      }              Map countryCapitals = ArrayUtils.toMap(countries); //ArrayUtils数组工具类的使用！       System.out.println("Capital of Japan is " + countryCapitals.get("Japan"));       System.out.println("Capital of France is " + countryCapitals.get("France"));     }   }

2.输出结果：

0 0