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OrgChart.java
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74 lines (65 loc) · 1.62 KB
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package recursive;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class OrgChart {
static Map<String, String> map;
static {
map = new HashMap<String, String>();
map.put("John", "Mary");
map.put("Jack", "Mary");
map.put("Smith", "Jack");
map.put("Steve", "Jack");
map.put("Harry", "Steve");
map.put("Tom", "John");
}
public static void main(String[] args){
System.out.println("Get all subordinates: ");
getAllSubordinates("Mary");
System.out.println();
System.out.println("Direct subordinates: ");
getDirectSubordinates("Mary");
System.out.println();
System.out.println("Indirect subordinates: ");
getInDirectSubordinates("Mary");
}
public static void getDirectSubordinates(String head){
if(head == null){
return;
}
if(map.containsValue(head)){
List<String> keys = getKeysByValue(head);
for(String key:keys){
System.out.println(key);
}
}
}
public static void getInDirectSubordinates(String head) {
List<String> keys = getKeysByValue(head);
for (String key : keys) {
getAllSubordinates(key);
}
}
public static void getAllSubordinates(String head){
if(head == null){
return;
}
if(map.containsValue(head)){
List<String> keys = getKeysByValue(head);
for(String key: keys){
System.out.println(key);
getAllSubordinates(key);
}
}
}
public static List<String> getKeysByValue(String value){
List<String> list = new ArrayList<String>();
for(Map.Entry<String, String> entry:map.entrySet()){
if(value.equals(entry.getValue())){
list.add(entry.getKey());
}
}
return list;
}
}