Question

我写了一些代码来计算员工的总加班费，每小时费率，基于加班费，医疗费，奖金费等的总金额等等。这就是代码，

    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)

有人请帮助我。无法弄清楚我做错了什么。

Answer 1

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。你可以，例如尝试将输入解析为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
}

Answer 2

快速修复（没有错误处理效率不高）可能如下。

double doubleValue = Double.parseDouble(someValue.getText().trim());
int intValue = (int)doubleValue;

在这里，您首先尝试将您拥有的任何字符串转换为Double，然后将其转换为整数注意：如果字符串不是数字，Double.parseDouble仍会抛出错误。

NumberFormatException用于JAVA中的输入字符串

2 个答案: