hashTable应用基本举例
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package Hashtable;
import java.util.Enumeration;
import java.util.Hashtable;
public class RoleRight {
private static class myHash {
private Hashtable<String, String> rightListHashtable = new Hashtable<String, String>();
public myHash()
{
this.init();
}
public void init() {
String[] accRoleLiStrings = { "admin", "satrap", "manager", "user",
"guest" };
String[] rightCodeLiStrings = { "10001", "10011", "10021", "2001",
"24011" };
for (int i = 0; i < accRoleLiStrings.length; i++) {
rightListHashtable.put(accRoleLiStrings[i],
rightCodeLiStrings[i]);
}
}
public String getRight(String accRole) {
if (rightListHashtable.containsKey(accRole))
return (String) rightListHashtable.get(accRole);
else {
return null;
}
}
public void delete(String accRole) {
if (rightListHashtable.containsKey(accRole))
rightListHashtable.remove(accRole);
}
public void print() {
Enumeration<String> RLkey = rightListHashtable.keys();
while (RLkey.hasMoreElements()) {
String accRoleString = RLkey.nextElement().toString();
System.out.println(accRoleString + "="
+ this.getRight(accRoleString));
}
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
myHash my=new myHash();
my.print();
String string=my.getRight("admin");
System.out.println(string);
my.delete("admin");
my.print();
}
}
import java.util.Enumeration;
import java.util.Hashtable;
public class RoleRight {
private static class myHash {
private Hashtable<String, String> rightListHashtable = new Hashtable<String, String>();
public myHash()
{
this.init();
}
public void init() {
String[] accRoleLiStrings = { "admin", "satrap", "manager", "user",
"guest" };
String[] rightCodeLiStrings = { "10001", "10011", "10021", "2001",
"24011" };
for (int i = 0; i < accRoleLiStrings.length; i++) {
rightListHashtable.put(accRoleLiStrings[i],
rightCodeLiStrings[i]);
}
}
public String getRight(String accRole) {
if (rightListHashtable.containsKey(accRole))
return (String) rightListHashtable.get(accRole);
else {
return null;
}
}
public void delete(String accRole) {
if (rightListHashtable.containsKey(accRole))
rightListHashtable.remove(accRole);
}
public void print() {
Enumeration<String> RLkey = rightListHashtable.keys();
while (RLkey.hasMoreElements()) {
String accRoleString = RLkey.nextElement().toString();
System.out.println(accRoleString + "="
+ this.getRight(accRoleString));
}
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
myHash my=new myHash();
my.print();
String string=my.getRight("admin");
System.out.println(string);
my.delete("admin");
my.print();
}
}
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