package com.naijab.nextzytimeline.utility;

import android.content.Context;
import android.support.annotation.NonNull;

import com.naijab.nextzytimeline.R;

public class StringUtility {

    @NonNull
    public static String getSaveSuccess(Context context) {
        return context.getResources().getString(R.string.save_success);
    }

    @NonNull
    public static String getSaveError(Context context) {
        return context.getResources().getString(R.string.save_error);
    }

    @NonNull
    public static String getDeleteSuccess(Context context){
        return context.getResources().getString(R.string.delete_success);
    }

    @NonNull
    public static String getDeleteError(Context context){
        return context.getResources().getString(R.string.delete_error);
    }

}

package com.naijab.nextzytimeline.utility;

import android.content.Context;
import android.support.annotation.NonNull;

import com.naijab.nextzytimeline.R;

public class StringUtility {

    @NonNull
    public static String getHomeString(Context context) {
        return context.getResources().getString(R.string.tab_home);
    }

    @NonNull
    public static String getAboutString(Context context) {
        return context.getResources().getString(R.string.tab_about);
    }

    @NonNull
    public static String getContactString(Context context) {
        return context.getResources().getString(R.string.tab_contact);
    }

    @NonNull
    public static String getSaveSuccess(Context context) {
        return context.getResources().getString(R.string.save_success);
    }

    @NonNull
    public static String getDeleteSuccess(Context context){
        return context.getResources().getString(R.string.delete_success);
    }

}

--- 
+++ 
@@ -8,23 +8,13 @@
 public class StringUtility {
 
     @NonNull
-    public static String getHomeString(Context context) {
-        return context.getResources().getString(R.string.tab_home);
+    public static String getSaveSuccess(Context context) {
+        return context.getResources().getString(R.string.save_success);
     }
 
     @NonNull
-    public static String getAboutString(Context context) {
-        return context.getResources().getString(R.string.tab_about);
-    }
-
-    @NonNull
-    public static String getContactString(Context context) {
-        return context.getResources().getString(R.string.tab_contact);
-    }
-
-    @NonNull
-    public static String getSaveSuccess(Context context) {
-        return context.getResources().getString(R.string.save_success);
+    public static String getSaveError(Context context) {
+        return context.getResources().getString(R.string.save_error);
     }
 
     @NonNull
@@ -32,4 +22,9 @@
         return context.getResources().getString(R.string.delete_success);
     }
 
+    @NonNull
+    public static String getDeleteError(Context context){
+        return context.getResources().getString(R.string.delete_error);
+    }
+
 }
Add get String from resource
