Create User.java

usrbinomarbash · web-flow · commit af1103c524ff · 2020-06-23T15:49:18.000+01:00
diff --git a/EqualsAndHashcode/User.java b/EqualsAndHashcode/User.java
@@ -0,0 +1,164 @@
+//I will override the address output 
+import java.util.*;
+public class User
+{
+	private String firstName;
+	public String lastName;
+	
+	static void log(Object o)
+    {
+   		System.out.print(o);
+	}
+
+    static void logln(Object o)
+    {
+        System.out.println(o);
+    }
+
+
+
+	public String getFullName()
+	{
+		return getFirstName() + " "  + lastName.toUpperCase();
+	}
+
+	public String output()
+	{
+		return "Hi, my name is "+ getFirstName() + " "  + getLastName() + ".";
+	}
+	
+	//Now I will overload output
+	public String output(boolean nice)
+	{
+		if(nice)
+		{
+			return "You\'re an awesome person"+ " "  + getFullName() + ".";
+
+		}
+		return "You\'re an idiot"+ " "  + getFullName() + ".";
+	}
+	
+	public String getFirstName()
+	{
+		return firstName;
+	}
+
+	//Setter not returning anything ∴ void
+	public void setFirstName(String fN)
+	{
+		//Assigning the fName value we pass in to the field firstName
+		fN=firstName;
+		//the .trim at the end will raise a null pointer exception because 
+		//it doesn't know what are we referencing
+		//the .strip remove any whitespaces before output.
+		
+	}
+
+	public String getLastName()
+	{
+		return lastName;
+	}
+
+	//Setter not returning anything ∴ void
+	public void setLastName(String lN)
+	{
+		//Assigning the lN value we pass in to the field lastName
+		lN=lastName;
+	}
+	
+
+	public static void printUsers(List<User> users)
+	{
+		//I want to iterate through the users
+		//For each User o in users)
+		for(User o:users)
+		{
+			logln(o.getFullName());
+		}
+	}
+
+	public static int searchList(List<User> users, String fN, String lN)
+	{
+		return searchList(users, fN + " "  + lN);
+	}
+
+	//OVERLOAD
+	public static int searchList(List<User> users, String fullName)
+	{
+		//iterate through the list
+		for(int i=0;i<users.size();i++)
+		{
+			//Use .equals instead of ==
+			if(users.get(i).getFullName().equals(fullName))
+			{
+				return i;
+			}
+		}
+
+		//if no match
+		return -1;
+	}
+
+
+   //Now I will override the ToString
+    @Override
+    public String toString()
+    {
+        //To override remember to give the method to override the same name
+        return "  " + getFullName() + "]";
+    }
+
+    //Intended to put obj in a hash table ∴ turn the hash code into a number
+    @Override
+    public int hashCode()
+    {
+    	final int prime = 19;
+    	int res = 1;
+    	res= prime * res + ((firstName==null) ? 0 : firstName.hashCode());
+    	res= prime * res + ((lastName==null) ? 0 : lastName.hashCode());
+    	return res;
+    }
+
+    @Override
+    public boolean equals(Object obj)
+    {
+    	if(this == obj)
+        {
+    		return true;
+        }
+    	if(obj == null)
+    	{
+    		return false;
+    	}
+    	if(getClass() != obj.getClass())
+    	{
+            return false;
+    	}
+
+        User other = (User) obj;
+
+        if(firstName == null){
+            if(other.firstName != null)
+            {
+                return false; 
+            }
+		} 
+		else if(!firstName.equals(other.firstName))
+		{
+	        logln(false);
+            
+            if(lastName == null)
+            {
+			    if(other.lastName != null)
+			    {
+                    return false; 
+			    }
+		    }	 
+		    else if(!lastName.equals(other.lastName))
+		    {
+				return false;
+		    }
+		}
+		 return true;
+    }
+}
