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我已经创建了JFormattedTextField的自定义组件（NumberFormattedTextField）。这是我使用的格式化程序：Java：语言环境是否影响格式化程序的JFormattedTextField
public static InternationalFormatter getDecimalIFormatter92() {
// For Buy & Sale Price
DecimalFormat numberFormat = (DecimalFormat) DecimalFormat.getNumberInstance();
numberFormat.setMaximumFractionDigits(2);
numberFormat.setMinimumFractionDigits(2);
numberFormat.setRoundingMode(RoundingMode.HALF_UP);
numberFormat.setGroupingUsed(false);
final InternationalFormatter formatter = new InternationalFormatter(numberFormat);
formatter.setAllowsInvalid(false);
formatter.setMinimum(0.00);
formatter.setMaximum(999999999.99);
return formatter;
}
当我创建NumberFormattedTextField的一个实例：
public RelationsPanel(CashParent parent) {
try {
initComponents(); // startBalTxt = new NumberFormattedTextField();
Utility.logInfo("initComponents OVER");
myParent = parent;
nameTxt.setSizeLimit(20);
System.out.println("startBalTxt.setFormatter GOING FOR IT");
this.startBalTxt.setFormatter(Utility.getDecimalIFormatter82()); // Must be throwing here
System.out.println("startBalTxt.setFormatter DONE");
this.currentBalTxt.setFormatter(Utility.getDecimalIFormatter82());
} catch (Exception e) {
Utility.logInfo("Failed to Initialize : " + e.getMessage());
e.printStackTrace();
}
}
NumberFormattedTextField类代码：
public class NumberFormattedTextField extends JFormattedTextField implements java.io.Serializable, DocumentListener, FocusListener {
private DecimalFormat numberFormat;
private InternationalFormatter formatter;
private double MAX_VALUE = 999999.99;
private final Map attributes = (Utility.getTextFont()).getAttributes();
/**
* Creates a NumberFormattedTextField with 6 Integer & 2 Fractional digits.
* Minimum is set to 0.00 and Max to 999999.99 without any grouping used.
*/
public NumberFormattedTextField() {
super();
createFormatter(); // Creates a default formatter, used if formatter is not set
this.setValue(0.00);
init();
}
private void createFormatter() {
// Create standard DecimalFormat
numberFormat = (DecimalFormat) DecimalFormat.getNumberInstance();
numberFormat.setMaximumFractionDigits(2);
numberFormat.setMinimumFractionDigits(2);
numberFormat.setRoundingMode(RoundingMode.HALF_UP);
numberFormat.setGroupingUsed(false);
formatter = new InternationalFormatter(numberFormat);
formatter.setAllowsInvalid(false);
formatter.setMinimum(0.00);
formatter.setMaximum(999999.99);
this.setFormatterFactory(new AbstractFormatterFactoryImpl());
}
private void init() {
setFont(Utility.getTextFont());
this.getDocument().addDocumentListener(this);
this.addFocusListener(this);
attributes.put(TextAttribute.STRIKETHROUGH, TextAttribute.STRIKETHROUGH_ON);
setFocusLostBehavior(PERSIST);
}
public void setFormatter(InternationalFormatter format) {
super.setFormatter(format);
System.out.println("Class of Format = " + format.getFormat().getClass());
if (format.getFormat() instanceof java.text.DecimalFormat)
numberFormat = (DecimalFormat)format.getFormat();
else
numberFormat = (DecimalFormat)(NumberFormat) format.getFormat();
formatter = format;
// AbstractFormatterFactoryImpl returns formatter straight away
this.setFormatterFactory(new AbstractFormatterFactoryImpl());
calculateMaxValue();
}
private void calculateMaxValue() {
try {
if (formatter.getMaximum() != null) {
//System.out.println(" MAX ALlowed = " + formatter.getMaximum());
String no = formatter.valueToString(formatter.getMaximum());
char seperator = java.text.DecimalFormatSymbols.getInstance().getGroupingSeparator();
no = no.replace(String.valueOf(seperator), "");
System.out.println("MAX Number to PArse = " + no);
MAX_VALUE = Double.parseDouble(no); // HERE ITS THROWING EXCEPTION
}
} catch (ParseException ex) {
Logger.getLogger(NumberFormattedTextField.class.getName()).log(Level.SEVERE, null, ex);
}
}
在我的电脑上面的代码工作得很好。但是，客户端PC上提示错误： 无法初始化：对于输入字符串：“99999999,99” ERROR /日志，我得到：
startBalTxt.setFormatter GOING FOR IT
INFO: initComponents OVER
Class of Format = class java.text.DecimalFormat
MAX Number to PArse = 99999999,99
INFO: Failed to Initialize : For input string: "99999999,99"
java.lang.NumberFormatException: For input string: "99999999,99"
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:1241)
at java.lang.Double.parseDouble(Double.java:540)
at cashaccountingapp.components.NumberFormattedTextField.calculateMaxValue(NumberFormattedTextField.java:184)
Class of Format = class java.text.DecimalFormat
at cashaccountingapp.components.NumberFormattedTextField.setFormatter(NumberFormattedTextField.java:173)
at cashaccountingapp.data.RelationsPanel.<init>(RelationsPanel.java:35)
我们俩的语言环境是不同的。
可能是这个错误的原因是什么？不同的区域设置或其他需要在我的NumberFormattedTextField类中注意的其他内容。我希望应用能够调整系统设置并相应地显示。
如何解决问题？
kleapatra是正确的。 MAX_VALUE = Double.parseDouble（no）; calculateMaxValue（）中的行引发异常。在代码中也添加了异常。该字符串有一个有效值而不是“。”。它有“，”十进制分隔符，这也是由于语言环境。所以我想现在的观点应该是“如何将字符串解析为这种语言环境的双倍”。任何想法，建议... – Tvd 2011-12-27 06:01:17