当我要求用户输入我使用下面代码制作的程序的数量时,默认文本为3.
String input = JOptionPane.showInputDialog(null, "Please enter new quantity",
JOptionPane.QUESTION_MESSAGE);
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我该如何改变?
嗨,我有一个全屏程序,我不希望人们关闭,除非他们有密码,我现在有这个代码
public void windowClosing(WindowEvent arg0)
{
System.out.println("HERE");
String inputValue = JOptionPane.showInputDialog("Please input the closeword");
if (inputValue != "closeplz")
{
}
}
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在if语句中我希望它停止方法,以便程序能够关闭.任何帮助将是非常好的感谢谢谢
我试图Robot在Java中使用来制作打印屏幕的图像文件.到目前为止,我有:
Robot robot = new Robot();
Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
BufferedImage capture = new Robot().createScreenCapture(screenRect);
ImageIO.write(capture, "bmp", new File("printscreen.bmp"));
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但我似乎无法创建该文件.
每次我尝试分割一个字符串,例如foo,bar,foo bar,bar它会在空格后跳过字符串.
如何阻止Java执行此操作?
String[] transactionItem = transactionItems[i].split(",");
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如果 transactioItems[0] = Y685,Blue Tie,2,34.79,2
它会输出
transactionItem[0] = Y685
transactionItem[1] = Blue
transactionItem[3] = out of bounds
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