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Choices for work, gaming, 5G streaming and anything else. The error is gone after I degrade JDK to 1. If it's OK, then check in the ". Open ". It could be due to too little memory. You can modify the eclipse. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 9 years, 4 months ago.
Active 4 months ago. Viewed 1. If anyone knows how to confirm that my Eclipse and Java are bit, that'd be appreciated. If you think my problem is a different one, please help! Please speak as plainly as you can, as I am totally new to Eclipse and Java. Improve this question. Tamara Koliada 1, 2 2 gold badges 12 12 silver badges 31 31 bronze badges.
Ben E. I'm not sure exactly how to check your java version, but you can always uninstall and download it fresh. See also stackoverflow. On my PC it can't be copied, I had to type it on the keyboard It will get copied.
A similar error might also occur "out of nowhere" because of an automatic Java update. DNA's answer helped me in this case, after I re-? Add a comment. Active Oldest Votes. Left for historical reference : To check your version of Java, run java -version in a console command prompt. On Windows 7 with bit Java 6 I get: java version "1. Improve this answer.
Well 3rd comment helped me. Now i know i have to download javabit — Ozan Atmar. The answer shows how to find out the installed Java version. What is missing is what Java version is required! I moved the path to the 64bit version of Java to the top of the list and the 32bit version to the end. Now Eclipse starts like a champion. Show 17 more comments. Dav 3 4 4 bronze badges. I just found this problem and noticed this same path prepended to my PATH env variable.
I just installed VirtualBox yesterday, so I assume that is the culprit. Good catch! Great Catch!!! Guys check your Env.
It is added after JRE8 update I guess. Why would you delete the entry when you can just point it to the correct directory instead? Show 4 more comments. Use one of the following combinations. Note that it is ok to have both bit and bit jre installed.
Jaswanth Kumar Jaswanth Kumar 3, 3 3 gold badges 20 20 silver badges 25 25 bronze badges. This worked for me. This worked for me after a Java 8 install, even though I never uninstalled any other versions of java. Mansour - With Java 8, Oracle bundled the uninstall of prior versions with the install. If you selected that option on install, uninstalling may leave you with nothing. I refuse to install a SDK when I actually only need a runtime.
People can arrive at that point a variety of ways, but in the end it isn't caused by a specific version of Java 6 vs. JDK - it's always rooted in a bit-ness mismatch. See the accepted answer above. One of the most notable navigation components is a top app bar.
You can also add buttons to the end side of the app bar. In Android, these are called action buttons. First, let's create a method to set up the toolbar. The method should get a reference to the toolbar using its id , and also get a reference to the activity using getActivity. Now add a call to the setUpToolbar method that we added to the content of the onCreateView method with the following:. Finally, add an onCreate method to ProductGridFragment.
In the method body, set the parameter of setHasOptionMenu as true. The callback onCreateOptionsMenu tells the activity what to use as our menu.
In this case, it will put the menu items from R. After those changes, your ProductGridFragment. Now the toolbar has a navigation icon, a title, and two action icons on the right side.
The toolbar also displays elevation using a subtle shadow, which shows it's on a different layer than the content. Let's start by adding one card underneath the top app bar. A card should have a region for an image, a title, and a label for secondary text. In this preview, you can see that the card is inset from the left edge of the screen, and it has rounded corners and a shadow which expresses the card's elevation.
The entire area is called the "container. You can add the following elements to a container: header text, a thumbnail or avatar, subhead text, dividers, and even buttons and icons.
The card we just created, for instance, contains two TextView s one for the title, and one for secondary text in a LinearLayout , aligned to the bottom of the card. Cards are usually shown in a collection with other cards.
In the next section of this codelab, we'll lay them out as a collection in a grid. When multiple cards are present in a screen, they are grouped together into one or more collections. Cards in a grid are coplanar, meaning they share the same resting elevation as one another unless picked up or dragged, but we won't be covering that in this codelab. It's in the same package as ProductGridFragment. The adapter class above manages the content of our grid. To determine what each view should do with its given content, we'll soon write the code for onBindViewHolder.
In the same package, you can also take a look at ProductCardViewHolder. This codelab provides all the code you need to build the complete app. What you'll do In this codelab, you'll learn how to design and construct an app using the Architecture Components Room, ViewModel, and LiveData, and build an app that does the following: Implements our recommended architecture using the Android Architecture Components.
Works with a database to get and save the data, and pre-populates the database with some words. Displays all the words in a RecyclerView in MainActivity. When the user enters a word, adds the word to the database and the list. Here's a preview: What you'll need Android Studio 3. Otherwise, you may have to wait until all the updates are done. An Android device or emulator. Using the Architecture Components There are a lot of steps to using the Architecture Components and implementing the recommended architecture.
What are the recommended Architecture Components? This diagram shows a basic form of this architecture: Entity : Annotated class that describes a database table when working with Room. Repository: Used to manage multiple data sources. RoomWordSample architecture overview The following diagram shows all the pieces of the app. On the next screen, name the app RoomWordSample, and click Finish. Update Gradle files Next, you'll have to add the component libraries to your Gradle files.
Open build. Add the following compileOptions block inside the android block to set target and source compatibility to 1. Create an entity The data for this app is words, and you will need a simple table to hold those values: Architecture components allow you to create one via an Entity.
Create a new class file called Word. This class will describe the Entity which represents the SQLite table for your words. Each property in the class represents a column in the table. Room will ultimately use these properties to both create the table and instantiate objects from rows in the database. Annotate your class declaration to indicate that it's an entity.
You can specify the name of the table if you want it to be different from the name of the class. PrimaryKey Every entity needs a primary key. To keep things simple, each word acts as its own primary key. NonNull Denotes that a parameter, field, or method return value can never be null.
Every field that's stored in the database needs to be either public or have a "getter" method. This sample provides a getWord method. There are also Delete and Update annotations for deleting and updating rows, but you are not using them in this app. To know more about the available conflict strategies, check out the documentation. There is no convenience annotation for deleting multiple entities, so it's annotated with the generic Query.
The LiveData class When data changes you usually want to take some action, such as displaying the updated data in the UI. Add a Room database What is a Room database? Room is a database layer on top of an SQLite database. Room uses the DAO to issue queries to its database. By default, to avoid poor UI performance, Room doesn't allow you to issue queries on the main thread. When Room queries return LiveData , the queries are automatically run asynchronously on a background thread.
Room provides compile-time checks of SQLite statements. Each entity corresponds to a table that will be created in the database. Database migrations are beyond the scope of this codelab, so we set exportSchema to false here to avoid a build warning. In a real app, you should consider setting a directory for Room to use to export the schema so you can check the current schema into your version control system.
The database exposes DAOs through an abstract "getter" method for each Dao. We've defined a singleton , WordRoomDatabase, to prevent having multiple instances of the database opened at the same time. We've created an ExecutorService with a fixed thread pool that you will use to run database operations asynchronously on a background thread.
Create the Repository What is a Repository? Why use a Repository? This adds complexity and much more code, and this sample is not about testing.
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