import java.awt.Dimension; import java.awt.Toolkit; public class ScreenSize { public static void main(String[] args) { // TODO 自動生成されたメソッド・スタブ Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); double width = screenSize.getWidth(); double height = screenSize.getHeight(); System.out.println("width = " + width); System.out.println("height = " + height); } }