Android Beginner need help-1.button not displaying text 2. is logic correct

Question 1) For some reason, when i click "generate" it does not display any text.I want the button to do the following: after the user input 3 values (int) for example : 1,1,2 and click the "generate" button and the display message should be "Isosceles Triangle: 2 Congruent Sides"---this works before but my logic was wrong and I asked a question here : If statement not working for android programming . then i try to implement the suggestions and now it has a different error

Question 2) Is my logic correct? Will I be able to display the correct result after fixing this problem?

Please help, I am new to android programming. Thanks so much in advance.

java code:

package com.example.trianglegame;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class TriangleGame extends Activity {// implement-have to use all of the
// methods
// set up the variables here

Button Gen;
EditText Input1;
EditText Input2;
EditText Input3;
String input1;
String input2;
String input3;

TextView Display;

int a;
int b;
int c;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.game);

    // assigning the values
    Input1 = (EditText) findViewById(R.id.editText1);
    Input2 = (EditText) findViewById(R.id.editText2);
    Input3 = (EditText) findViewById(R.id.editText3);

    Display = (TextView) findViewById(R.id.textView5);

    Gen = (Button) findViewById(R.id.button1);

    Gen.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

            // getting the text and converting it to string value
            input1 = Input1.getText().toString();
            input2 = Input2.getText().toString();
            input3 = Input2.getText().toString();

            // converting those text values back into int
            a = Integer.parseInt(input1);
            b = Integer.parseInt(input2);
            c = Integer.parseInt(input3);

            // displaying the message

            if ((a == b && b != c) || (a == c && b != c)
                    || (b == c && a != c)) {
                Display.setText("Isosceles Triangle: 2 Congruent Sides");
            } else if (a == b && a == c) {
                Display.setText("Equilateral Triangle:All sides are equal");
            }

            else if (a != b && a != c && b != c) {
                Display.setText("Scalene Triangle: No Congruent Sides");
            } else {
                Display.setText("Error");
            }

        }
    });
}
}

xml code

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://ift.tt/nIICcg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="@string/enter_text" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:text="@string/side_1" />

<EditText
    android:id="@+id/editText1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/type_hint"
    android:inputType="number" >

    <requestFocus />
</EditText>

<TextView
    android:id="@+id/textView3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/side_2" />

<EditText
    android:id="@+id/editText2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/type_hint"
    android:inputType="number" />

<TextView
    android:id="@+id/textView4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:hint="@string/type_hint"
    android:text="@string/side_3" />

<EditText
    android:id="@+id/editText3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:hint="@string/type_hint"
    android:inputType="number" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/generate" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/clear" />
</LinearLayout>

<TextView
    android:id="@+id/textView5"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

</LinearLayout>