What is SWT in Java?

What is swt in Java, specific code examples are needed

swt is called Standard Widget Toolkit, which is a graphical user interface (GUI) based on the local operating system Library, for the Java language. Compared with Swing, swt is closer to the appearance and behavior of the operating system's local controls, and can provide a more native and efficient user interface interaction experience. In Java development, we can use swt to build rich and interactive application interfaces.

With its close integration with the local controls of the operating system, swt can make full use of the resources of the operating system, provide faster response and better performance, and can also fully utilize the graphics acceleration function of the operating system. In addition, swt provides many easy-to-use GUI components, including buttons, labels, lists, text boxes, menus, etc., which can meet our needs for various common user interface elements.

The following is a simple swt program example that demonstrates how to create a simple window and add a button and a label:

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.*;

public class SWTExample {
    public static void main(String[] args) {
        // 创建Display对象，表示与操作系统之间的连接
        Display display = new Display();
        
        // 创建Shell对象，代表应用程序的窗口
        Shell shell = new Shell(display);
        shell.setText("SWT Example");
        
        // 创建按钮对象，并设置位置和文本
        Button button = new Button(shell, SWT.PUSH);
        button.setBounds(10, 10, 80, 30);
        button.setText("Click me");
        
        // 创建标签对象，并设置位置和文本
        Label label = new Label(shell, SWT.NONE);
        label.setBounds(100, 15, 200, 20);
        label.setText("Hello, SWT!");
        
        // 给按钮添加点击事件处理逻辑
        button.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                label.setText("Button clicked!");
            }
        });
        
        // 打开窗口
        shell.open();
        
        // 进入事件循环，处理窗口事件
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
        
        // 释放资源
        display.dispose();
    }
}

In the above example, a Display object is first created, Represents the connection to the operating system. Then a Shell object is created to represent the application's window. Then create a button and a label, and set the position and text respectively. Finally, click event processing logic is added to the button. When the button is clicked, the text of the label will change. Finally, the window is opened and the event loop is entered to handle window events until the window is closed.

Through this simple example, we can have a preliminary understanding of the usage of swt. Of course, swt also provides more functions and components to meet more complex user interface development needs. If you are interested in swt, it is recommended that you check more official documents and tutorials to learn more about its usage and features.

The above is the detailed content of What is SWT in Java?. For more information, please follow other related articles on the PHP Chinese website!