See the java. Object). You may check out the related API usage on the sidebar. Aug 3, 2025 · In this blog post, that can be seen as a follow-up of my last post about acquire release semantics, I want to shine some light on getOpaque and setOpaque. 8 opacity), and completely transparent backgrounds, you can create visually rich, layered UIs. It is setContentAreaFilled that makes a button BG disappear. Object, java. Dec 19, 2025 · Transparency in Java Graphics2D is controlled via the alpha channel and setOpaque(false) for non-opaque components. g. JButton # setOpaque () The following examples show how to use javax. Nov 20, 2015 · 우선 "JLabel" 클래스의 "setOpaque"로 색을 적용 하겠다는 설정을 켜주어야 합니다. When I setOpaque(false) on the parent, the children still have opacity. Java documentation for android. lang. Discover its usage, code snippets, and common pitfalls. JComponent javax. Both index i and newValue are passed as parameters to the method. Mar 10, 2024 · 文章浏览阅读668次。本文通过一个示例介绍了Java Swing中JComponent的setOpaque方法，该方法用于设置组件是否不透明。当设置为false时，组件变得透明，允许底层组件透过显示。测试用例展示了如何创建一个透明的JPanel，并解释了如何通过这个方法改变组件的透明度。 May 8, 2021 · 文章浏览阅读3k次，点赞5次，收藏28次。该篇博客展示了如何在Java Swing中创建一个带有背景图片的 JFrame，并设置内容窗格透明，同时添加了账号输入框、密码输入框和登录、注册按钮等组件，实现了界面的布局和美化。 Jul 17, 2023 · java setOpaque设置半透明，#Java中设置半透明背景的方法##引言在Java开发中，经常需要设置组件的背景为半透明。 本文将介绍如何使用`setOpaque`方法来实现Java中的半透明效果。 ##步骤概览下面是实现该功能的步骤概览，我们将在接下来的文章中详细讲解每个步骤。 javax. Using an Action with a button has many benefits beyond directly configuring a サンプルコード それでは簡単なサンプルプログラムを作って試してみます。 テキストエディタで次のように記述したあと、 JSample3_1. So I hacked up this function (thanks SOF users): Component[] comps = this. I want to see only the text content of my cells. Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2. Feb 5, 2023 · Java JPanel. public class TwoPanels { public static v Jan 20, 2025 · Javaで「テキストフィールドの前景色/背景色の設定と背景の透明/非透明の切り替え」の動作を確認してみた。 Java 初心者 Posted at 2025-01-19 Contribute to Joy-Paul6076/Java-bank-management-system development by creating an account on GitHub. This method is used to indicate whether a component is opaque or not. Syntax: public final void setOpaque(V newValue) Parameters: This method accepts Apr 4, 2009 · JComponent. AtomicReferenceArray<E> Type Parameters: E - The base class of elements held in this array All Implemented Interfaces: Jan 11, 2021 · Descripción Sintaxis public final void setOpaque(V newValue) Parámetros V newValue, Clase Padre AtomicReference Ejemplo Líneas de Código The base class for all Swing components except top-level containers. Added in 9. AtomicReference<V> Type Parameters: V - The type of object referred to by this reference All Implemented Interfaces: Serializable Jun 15, 2015 · 先看API：publicvoidsetOpaque(booleanisOpaque)如果为true，则该组件绘制其边界内的所有像素。否则该组件可能不绘制部分或所有像素，从而允许其底层像素透视出来。对于JComponent而言，此属性的默认值是false。但是对于大多数标准的JComponent子类（ Aug 1, 2014 · My question is whether the use of setOpaque(false), which I've come to use with JPanel to layout UI in Swing, impacts painting performance more than keeping everything opaque (where isOpaque() retu Feb 16, 2021 · 文章浏览阅读1. atomic. コンポーネント固有のプロパティのサポート。 putClientProperty(java. See Dev. JComponent | +--javax. 9w次，点赞15次，收藏31次。本文详细介绍了Java组件的setOpaque ()方法的用途和工作原理，通过创建两个面板来演示设置为true和false时的差异，其中设置为false时组件背景颜色会透明显示，而设置为true时则会正常显示组件中的每个像素。 Jan 3, 2020 · The setOpaque () method of a AtomicReferenceArray class is used to set the value of the element at index i to newValue. Java documentation for java. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. In this way value is set in program order, but with no assurance of memory ordering effects with respect to other threads. See How to Use Buttons, Check Boxes, and Radio Buttons in The Java Tutorial for information and examples of using buttons. 그 다음에 빨간색 네모 부분에 2가지 "Color"에 대한 객체를 선언 생성하고 있습니다. I’ll show how it is defined and what that means in practice, as well as how get and setOpaque relate to the weaker getPlain and setPlain and the stronger getAcquire and setRelease. To use a component that inherits from JComponent, you must place the component in a containment hierarchy whose root is a top-level Swing container. For example, when you change the background of a JCheckBox to Color. Object) methods, you can associate name-object pairs with any object that descends from JComponent. JButton #setOpaque () . 9w次，点赞15次，收藏31次。本文详细介绍了Java组件的setOpaque ()方法的用途和工作原理，通过创建两个面板来演示设置为true和false时的差异，其中设置为false时组件背景颜色会透明显示，而设置为true时则会正常显示组件中的每个像素。 This page shows Java code examples of javax. Class AtomicReference<V> java. The JLabel is already set to the blue background but it is not opaque until you press the button. For an Jul 12, 2011 · How to make JFrame transparent? I want to make my JFrame transparent. Apr 30, 2010 · I'm trying to add a JPanel to a JFrame and write some text on the JPanel so only the text appears, without the JPanel's gray background. May 1, 2013 · I have tried textField. atomic package specification for description of the properties of atomic variables. In this guide, we will cover how to use VarHandle for manipulating opaque memory, ensuring visibility guarantees without memory reordering issues. Dec 19, 2014 · " setOpaque saved my life" Actually @Birdy, it's unnecessary (at least in the five PLAFs I tested on Windows just now). JLabel#setOpaque Aug 1, 2014 · My question is whether the use of setOpaque(false), which I've come to use with JPanel to layout UI in Swing, impacts painting performance more than keeping everything opaque (where isOpaque() retu Learn how to adjust the opacity of a JPanel in Java using setOpaque and AlphaComposite for better UI effects. When I set the back ground color of the label to some color and set the setOpaque to true it does not show up the color. It really should be called JComponent. When you setOpaque ( true ), Swing wipes the background to the component’s background colour before calling your paintComponent method. See How to Use Buttons, Check Boxes, and Radio Buttons in The Java Tutorial for examples and information on using check boxes. EDIT: The problem seem Jun 5, 2019 · I keep fighting to understand what VarHandle::setOpaque and VarHandle::getOpaque are really doing. JComponent에는 setOpaque(boolean isOpaque) 메소드가 있다. you know? Is this possi We would like to show you a description here but the site won’t allow us. Its breaking my code because components that are normally transparent no longer are. 3k次。博客主要介绍Java中setOpaque方法，设置为true时原样显示组件像素，设置为false时组件某些像素不显示，允许底层像素显现。还给出示例代码，通过运行结果展示设置为true和false时组件背景色的不同显示效果。 AtomicReference类的setOpaque ()方法用于设置具有 memory 效应的该AtomicReference对象的值，该效应由VarHandle. This page shows Java code examples of javax. wipeBackground ( Boolean ). 0" Java (TM) 2 Runtime Environment, Standard Edition (build 1. JPanel JComponent を継承して . Dec 11, 2010 · Opaque has a very specific meaning in Swing - it means that the component fully paints the full area within its bounds (see the setOpaque javadoc) This is used primarily to determine whether it is necessary to repaint components behind the current component. Object)のメソッドの場合、名前とオブジェクトのペアをJComponentから派生するどのオブジェクトにも関連付けることができます。 Sep 28, 2019 · JAVA에서 다른 컴포넌트들은 배경색 적용할 때 그냥 바로 쓰면 적용되는 것 같은데 (공부중이라 JLabel뿐인지는 모름 ) JLabel은 안되서 당황했었다. Why is it still not opaque? Does setOpaque work for if Jan 3, 2020 · The setOpaque () method of a AtomicReferenceArray class is used to set the value of the element at index i to newValue. The Java Tutorials have been written for JDK 8. Component | +--java. 이는 JLabel의 배경색이 기본적으로 투명이기 때문이다. I tried to use JPanel with setOpaque(false), but I still have a lightGrey background ! Is it normal ??? I don't think so. , 0. Object) and getClientProperty(java. With the putClientProperty(java. Aug 25, 2010 · Let's say I want to make the opacity of a JPanel %20 viewable? I don't mean setOpaque (draw or not draw) or setVisible (show or hide) I mean make it see-through JPanel. May 24, 2022 · 文章浏览阅读782次。本文探讨了Java Swing中JLabel组件的不透明性问题，指出默认情况下JLabel的isOpaque ()返回false，导致无法看到背景色。通过设置setOpaque (true)，可以使得JLabel显示背景颜色。同时，文章对比了Component与JComponent的isOpaque ()源码，并展示了不同组件默认的isOpaque ()状态，揭示了AWT与Swing组件 Nov 20, 2015 · 우선 "JLabel" 클래스의 "setOpaque"로 색을 적용 하겠다는 설정을 켜주어야 합니다. base, package: java. I also have a JTextfield and here it is working, Sep 11, 2013 · I have a jLabel which initially has setOpaque set to false by default. 0-b92, mixed mode) FULL OPERATING SYSTEM VERSION : Microsoft Windows 2000 [Version 5. 2195] A DESCRIPTION OF THE PROBLEM : 不透明なコンポーネント Swing コンポーネントでも得に汎用的で利用頻度の高く AWT における Canvas と Panel クラスの基本的な機能を引き継いでいる javax. Learn how to set a transparent JFrame background while ensuring JPanel or JLabel backgrounds remain opaque in Java Swing. Nov 23, 2025 · 文章浏览阅读2. Container | +--javax. Object…)指定。这样，就可以按程序顺序设置值，但不能保证相对于其他线程的内存排序效果。 用法: public final void setOpaque (V newValue) 参数： 此方法接受newValue，它是要设置的新值。 返回 Oct 17, 2001 · Hi, I'm looking for help to have background transparent panels. 0- b92) Java HotSpot (TM) Client VM (build 1. User should see the background when my JFrame is on top of it. An infrastructure for painting that includes double buffering and support for borders. Javadocs and their Interpretation Unfortunately, the Dec 27, 2019 · The setOpaque () method of a AtomicReference class is used to set the value of this AtomicReference object with memory effects as specified by VarHandle. For more information see Swing's Threading Policy. Mar 19, 2016 · Can anyone explain why Nimbius treats the setOpaque() differently than other java LaF's. atomic, class: AtomicLong By convention, any number of check boxes in a group can be selected. A boolean value that may be updated atomically. But setting the opaqueness of the JPanel to false isn't working Aug 11, 2014 · This a simple application I got from here this answer to How to set a Transparent Background of JPanel that's supposed to explain how setOpaque() works. setBackground We would like to show you a description here but the site won’t allow us. 00. Warning: Swing is not thread safe. java for updated tutorials taking advantage of the latest releases. Object java. When a JCheckBox is made transparent by means of setOpaque (false) the underlying component does not show through. Mar 4, 2010 · In my JPanel, I set the background of a JLabel to a different color. jlabel. See JDK Jan 24, 2007 · Extending DefaultTreeCellRenderer, setOpaque has no effect 843805 Jan 24 2007 — edited Jan 24 2007 Aug 15, 2013 · Calling setOpaque for any of the components in the question is unnecessary - by default the backgrounds are displayed when custom painting is correctly implemented. java. setOpaque(boolean). . setOpaque(false) then textField. 5 Attribution License. java という名前で保存します。 Description Name: gm110360 Date: 05/23/2002 FULL PRODUCT VERSION : java version "1. awt. See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases. Container javax. Object)とgetClientProperty(java. I am having a problem with setting JButtons so the are not opaque to i can see the image behind them. For example I know that in Swing Opaque means that when painting Swing wont paint what is behind the compon Learn about the setOpaque () method in Java, its uses, and how it enhances the rendering performance of Swing components. JLabel#setOpaque Dec 8, 2008 · 본문 기타 기능 Java Swing 객체중에 하나인 JLable의 경우 배경색을 설정하면 효과가 적용되지 않는다. Mar 17, 2025 · 在Java的Swing和AWT库中，setOpaque 方法是一个重要的工具，用于控制组件的透明度。 本文将深入探讨 setOpaque 方法的工作原理，以及如何利用它来创建具有不同透明度效果的图形用户界面（GUI）。 Refer to Swing Components Supporting Action for more details, and you can find more information in How to Use Actions, a section in The Java Tutorial. Sep 28, 2019 · JAVA에서 다른 컴포넌트들은 배경색 적용할 때 그냥 바로 쓰면 적용되는 것 같은데 (공부중이라 JLabel뿐인지는 모름 ) JLabel은 안되서 당황했었다. setOpaque (int, E). JPanel クラスをここで紹介します java. JLabel All Implemented Interfaces: ImageObserver, MenuContainer, Serializable, Accessible, SwingConstants Direct Known Subclasses: BasicComboBoxRenderer, DefaultListCellRenderer, DefaultTableCellRenderer, DefaultTreeCellRenderer public class Support for component-specific properties. Component java. We would like to show you a description here but the site won’t allow us. Warning: Serialized objects of this class will not be compatible with future Swing releases. This replaces the AWT (Advanced Windowing Toolkit) update / paint mechanism. For examples and task-oriented documentation for JPanel, see How to Use Panels, a section in The Java Tutorial. Buttons can be configured, and to some degree controlled, by Action s. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. Images will speak by themselves: When I do this code: JRadioButton myJRadioButton = new JRadioButton declaration: module: java. By mastering opaque, semi-transparent (e. setOpaque ( boolean ) is misnamed. Why i Java Code Examples for javax. Top-level Swing containers -- such as JFrame, JDialog, and JApplet -- are specialized components that provide a place for other Swing components to paint themselves. Could anyone Nov 23, 2025 · 文章浏览阅读2. Object | +--java. setBackground(new Color(0,0,0,128)), but it ended up completely transparent. concurrent. swing. util. setOpaque (java. Sorry for jumping in (checks watch) a bit late on this, but it just came to my attention as a duplicate of a question today. java という名前で保存します。 サンプルコード それでは簡単なサンプルプログラムを作って試してみます。 テキストエディタで次のように記述したあと、 JSample2_2. Sep 11, 2024 · サンプルコード それでは簡単なサンプルプログラムを作って試してみます。 テキストエディタで次のように記述したあと、 Sample. The setOpaque () method in Java is part of the Component class, specifically in the AWT (Abstract Window Toolkit) framework. setOpaque (false) doesn't make JPanel Transparent Asked 2 years, 11 months ago Modified 2 years, 11 months ago Viewed 77 times Sep 25, 2018 · This time I'll explain how to make a title screen with a background picture and how to make JPanel or JButton transparent. This time we use:setOpaque (true/fal JPanel is a generic lightweight container. AtomicReferenceArray. Follow our expert guide. 4. &nbsp; JLabel label = ne Aug 11, 2014 · This a simple application I got from here this answer to How to set a Transparent Background of JPanel that's supposed to explain how setOpaque() works. I also tried it without setting opaque to false and the textField became less transparent every time you type. java という名前で保存します。 The content is assumed to be opaque by default. An AtomicBoolean is used in applications such as atomically updated flags, and cannot be used as a replacement for a Boolean. Aug 13, 2024 · 在Java中，通过设置文本框的透明度，可以实现更为美观的用户界面。 核心方法包括：使用setOpaque (false)、自定义绘制、利用第三方库。 以下将详细介绍其中一种方法，具体步骤如下： 使用setOpaque (false)可以让JTextField或者JTextArea的背景变为透明。 I want to remove the background of my JRadioButton but still keeping the same look &amp; feel. 만약 "setOpaque"를 "false" 로 설정되어 있다면 백그라운드 색은 적용되지 않습니다. RED, then repeatedly toggle its Opaque state, the background will remain red, no matter what the Opaque state. See this code as an example. Nov 23, 2025 · ` setOpaque() `是 Java Swing中的一个 方法，它用于设置组件的不透明度。 当将组件的`opaque`属性设置为`true`时，组件将完全不透明，即使它的背景是透明的。 当将其设置为`false`时，组件将变得透明，允许其下方的组件或 Sep 11, 2024 · サンプルコード それでは簡単なサンプルプログラムを作って試してみます。 テキストエディタで次のように記述したあと、 Sample. public class TwoPanels { public static v We would like to show you a description here but the site won’t allow us. Java中setOpaque ()方法是什么意思，有什么作用？此方法是设置控件是否透明的。true表示不透明，false表示透明。举例：JButton iconButton = new JButton ("按钮"); iconButton. TextureView. setOpaque (true);// Class JLabel java. setOpaque (true); //Opaque값을 true로 미리 설정해 주어야 배경색이 적용된다. view. You would set setOpaque ( false ) if you want what is behind your Learn how to properly manage the opacity of JLabel in Java Swing using setOpaque in if statements to display background colors effectively. I can see the word "Test" and it's blue, but the background doesn't change at all. The current serialization support is appropriate for short The Java Tutorials have been written for JDK 8. How can I get it to show? this. java という名前で保存します。 Aug 16, 2024 · 在编程语言Java中，我们可以通过使用Swing库中的JComponent类和其setOpaque方法来调整文本框的透明度。 这种方法的基本步骤包括：创建一个文本框，通过setOpaque方法设置其不透明度，然后将这个文本框添加到你的图形用户界面（GUI）中。 Jul 23, 2012 · Possible Duplicate: Java swing Table transparency It is not so easy to make a JTable background transparent. Learn how to utilize setOpaque (true/false) in Java to control component transparency. Mar 16, 2010 · In Java2D when you use setOpaque I am a little confused on what the true and false does. It has not been easy so far - there are some things I think I get (but will not present them in the Aug 22, 2020 · My JLabel won't change to a blue background. Oct 2, 2011 · I've got some Swing components with children. See JDK Jan 20, 2025 · Javaで「テキストフィールドの前景色/背景色の設定と背景の透明/非透明の切り替え」の動作を確認してみた。 Java 初心者 Posted at 2025-01-19 The VarHandle class in Java provides a mechanism to perform low-level operations on variables at runtime, including setting and getting values with various memory access modes such as 'opaque'. Learn how to implement transparency in JTabbedPane for Java Swing applications with expert tips and code examples.

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