Java Swing JFrame实现全屏--无标题，无边框

实现方式一：

import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.JFrame;
public class TestJFrame extends JFrame {
    public static void main(String[] args) {
        TestJFrame frame = new TestJFrame();
        Toolkit kit = Toolkit.getDefaultToolkit();
        Dimension dimension = kit.getScreenSize();
        frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
        frame.setBounds(0, 0, dimension.width, dimension.height);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setUndecorated(true);
        frame.setVisible(true);
    }
}

使用setUndecorated()方式实现
禁用或启用此窗体的装饰。只有在窗体不可显示时才调用此方法。就是要在setVisible之前调用

实现方式二：

import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import javax.swing.JFrame;
public class TestJFrame extends JFrame {
    public static void main(String[] args) {
        TestJFrame frame = new TestJFrame();
        GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment()
                .getDefaultScreenDevice();
        gd.setFullScreenWindow(frame);
    }
}