title: NumberFormatException For Input String in JAVA
body: <p>I've written some code which calculate employee's Total overtime,Rate per hour,Total amount based on their overtime,medical,bonus,others etc etc.Here is the code,       </p>
  
  <pre><code>    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);
  </code></pre>
  
  <p>Why this is giving me the following error when I try to calculate,</p>
  
  <pre><code>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)
  </code></pre>
  
  <p>Someone please help me. Can't figure out what I did wrong.</p>