JAVA中输入字符串的NumberFormatException

JAVA中输入字符串的NumberFormatException,java,numberformatexception,Java,Numberformatexception,我写了一些代码来计算员工的总加班时间、每小时工资、基于加班的总金额、医疗、奖金、其他等等。下面是代码 int salary = Integer.parseInt(txt_salary.getText().trim()); int overtime = Integer.parseInt(txt_overtime.getText().trim()); double eight = 8; double days = 25; double dbop = 0;

我写了一些代码来计算员工的总加班时间、每小时工资、基于加班的总金额、医疗、奖金、其他等等。下面是代码

    int salary = Integer.parseInt(txt_salary.getText().trim());
    int overtime = Integer.parseInt(txt_overtime.getText().trim());

    double eight = 8;
    double days = 25;
    double dbop = 0;
    double overtimeRate = 1.5;

    //calculate the total hours of overtime
    double Total_Overtime = overtime * overtimeRate;
    String x = (String.valueOf(Total_Overtime)).trim();
    txt_hw.setText(x);

    //calculate overall overtime 
    dbop = salary /days/eight;
    String s = (String.valueOf(dbop)).trim();
    txt_rate.setText(s);

    int med = Integer.parseInt(txt_med.getText().trim());
    int bonus = Integer.parseInt(txt_bonus.getText().trim());
    int other = Integer.parseInt(txt_other.getText().trim());
    int f = med+bonus+other;
    double calc = Total_Overtime * dbop+f;
    String c = (String.valueOf(calc)).trim();
    lbl_total.setText(c);
为什么在我尝试计算时会出现以下错误

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "20000.0"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.parseInt(Integer.java:615)
at Allowance.btn_calcAllwActionPerformed(Allowance.java:764)
at Allowance.access$500(Allowance.java:18)
at Allowance$5.actionPerformed(Allowance.java:248)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6535)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6300)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4891)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2750)
at java.awt.Component.dispatchEvent(Component.java:4713)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

有人请帮帮我。无法找出我做错了什么。

您正在尝试将字符串“20000.0”转换为整数。20000.0不是有效的整数值,因此转换失败。例如,您可以尝试将输入解析为double

final String text = "20000.0";
try {
  final double value = Double.parseDouble(s);
  final int iValue = (int) value; // Be aware you are loosing precision here
  [...]
} catch (NumberFormatException exception){
  // Proper error handling
}

您正在尝试将字符串“20000.0”转换为整数。20000.0不是有效的整数值,因此转换失败。例如,您可以尝试将输入解析为double

final String text = "20000.0";
try {
  final double value = Double.parseDouble(s);
  final int iValue = (int) value; // Be aware you are loosing precision here
  [...]
} catch (NumberFormatException exception){
  // Proper error handling
}
快速修复(如果没有错误处理,则效率低下)可能如下所示

double doubleValue = Double.parseDouble(someValue.getText().trim());
int intValue = (int)doubleValue;
在这里,您首先尝试转换必须加倍的字符串,然后将其转换为整数。
注意:如果字符串不是数字,Double.parseDouble仍将抛出错误。

下面是一个快速修复(没有错误处理就没有效率)

double doubleValue = Double.parseDouble(someValue.getText().trim());
int intValue = (int)doubleValue;
在这里,您首先尝试转换必须加倍的字符串,然后将其转换为整数。

注意:如果字符串不是数字,Double.parseDouble仍将抛出错误。

您应该使用Double type来转换字符串“20000.0”。记住这一点,您还需要确保存储转换值的类型也是double类型。您应该使用double类型来转换字符串“20000.0”。记住这一点,您还需要确保存储转换值的类型也是double.Nice one Stefan类型。我试图用完全相同的方式解释:)我希望你(对我的答案)投赞成票。事实上,我并没有宣布任何像“20000.0”这样的值。我有4个文本字段,如加班、医疗、奖金、其他,根据这些字段,在总加班时间、每小时费率、总金额字段中将给出结果。当我在这4个输入文本字段中插入任何值时,它会自动给我这些数字的异常。@Tabassum插入任何值都会造成麻烦,因为您没有异常处理。如果在这些文本字段中输入20会发生什么?还请突出显示代码段中发生异常的那一行。at allowment.btn_calcalwactionperformed(allowment.java:764)是第一行,int salary=Integer.parseInt(txt_salary.getText().trim())@塔巴苏姆,这正是我所期望的。例外情况是在文本字段中输入了“20000.0”。将此字符串传递给Integer.parseInt会导致异常。请尝试输入20000,这应该有效。如果您需要处理20000.0之类的值,则必须使用Double.parseValueNice one Stefan。我试图用完全相同的方式解释:)我希望你(对我的答案)投赞成票。事实上,我并没有宣布任何像“20000.0”这样的值。我有4个文本字段,如加班、医疗、奖金、其他,根据这些字段,在总加班时间、每小时费率、总金额字段中将给出结果。当我在这4个输入文本字段中插入任何值时,它会自动给我这些数字的异常。@Tabassum插入任何值都会造成麻烦,因为您没有异常处理。如果在这些文本字段中输入20会发生什么?还请突出显示代码段中发生异常的那一行。at allowment.btn_calcalwactionperformed(allowment.java:764)是第一行,int salary=Integer.parseInt(txt_salary.getText().trim())@塔巴苏姆,这正是我所期望的。例外情况是在文本字段中输入了“20000.0”。将此字符串传递给Integer.parseInt会导致异常。请尝试输入20000,这应该有效。如果需要处理20000.0之类的值,那么必须使用Double.parseValue