根据72.6×1.05 =76.23,写出的两个除法算式是( )和( )。
76.23÷72.6=1.05;76.23÷1.05=72.6
下列各组词语中有错别字的一项是[ ]
A.狂舞 闪射 亢奋 沉稳 戛然而止
B.羁绊 闭塞 辐射 忘情 惊心动魄
C.震撼 活跃 飞溅 躁热 抑扬顿挫
D.屏气 磅薄 淋漓 晦暗 铿锵激越
本题的功能是监听对于菜单项和工具条的操作。窗口中有一个菜单“Color”和一个工具体,菜单“Color”中有菜单项“Yellow”、“Blue”、“Red”和“Exit”,每个菜单项都有对应的图形,单击前三个颜色菜单项,主窗口就变成对应的颜色,单击“Exit”则退出程序。工具条上有4个按钮,分别为三个颜色按钮和一个退出程序的按钮,单击任意一个颜色按钮,主窗口将变成按钮对应的颜色,单击退出程序按钮,则退出程序。 import java.awt.*; import java.awt.event.*; import java.beans.*; import iavax.swing.*; public class java3 public static void main(String[]args) ToolBarFrame frame=new ToolBarFrarne(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.show(); class ToolBarFrame extends JFrame public ToolBarFrame() setTitle("java3"); setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT); Container contentPane=getContentPane(); panel=new JPanel(); contentPane.add(panel,BorderLayout.CENTER);
Action blueAction=new ColorAction("Blue",new ImageIcon("java3-blue-ball.gif"),Color.BLUE);Action yellowAction=new ColorAction("Yellow",new ImageIcon("java3-yellow-ball.gif"),Color.YELLOW);Action redAction=new ColorAction("Red",new ImageIcon("java3-red-ball.gif"),Color.RED);Action exitAction=newAbstractAction("Exit",new ImageIcon("java3-exit.gif"))public void actionPerformed(ActionEvent event)System.exit(0);;exitAction.putValue(Action.SHORT_DESCRIPTION_"Exit");JToolBar bar=new JToolBar();bar.add(blueAction);bar.add(yellowAction);bar.add(redAction);bar.addSeparator();bar.add(exitAction);contentPane.addToolBar(bar,BorderLayout.NORTH);JMenu menu=new JMenu("Color");menu.add(yellowAction);menu.add(blueAction);menu.add(redAction);menu.add(exitAction);JMenuBar menuBar=new JMenuBar();menuBar.add(menu);SetJMenu(menuBar);public static final int DEFAULT_WIDTH=300;public static final int DEFAULT_HEIGHT=200;private JPanel panel;class ColorAction extends AbstractActionpublic ColorAction(String name,Icon icon,Color c)putValue(Action.NAME,name);putValue(Action.SMALL_ICON,icon);putValue(Action.SHORT_DESCRIPTION,name +"background");putValue("Color",c);public void actionPerformed(ActionEvent evt)Color c=(Color)getValuc("Color");panel.setBackcolor(c);