I keep getting this error in my console, however there's no error in my coding when I look over it. It also keeps opening up the exact same JOptionPanes when I don't want it to open up. After the loops supposedly finish, the JOptionPane reopens and goes through asking the user to input values for the Bingo Card. However, it still fills and makes a BingoCard after the first JOptionPane loops are done.
我在我的控制台中不断地得到这个错误，但是当我查看它时，我的代码中没有错误。当我不想打开时，它也会打开完全相同的JOptionPanes。假设循环结束后，JOptionPane会重新打开并通过询问用户为Bingo卡输入值。但是，在完成第一个JOptionPane循环之后，它仍然填充并生成一个BingoCard。
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.SwingUtilities.computeIntersection(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$1000(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.WaitDispatchSupport$2.run(Unknown Source)
at java.awt.WaitDispatchSupport$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(Unknown Source)
at java.awt.Dialog.show(Unknown Source)
at javax.swing.JOptionPane.showOptionDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at day1.example.BingoCard.paintComponent(BingoCard.java:22)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Window.paint(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$1000(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.WaitDispatchSupport$2.run(Unknown Source)
at java.awt.WaitDispatchSupport$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(Unknown Source)
at java.awt.Dialog.show(Unknown Source)
at javax.swing.JOptionPane.showOptionDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at day1.example.BingoCard.paintComponent(BingoCard.java:22)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paintToOffscreen(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
at javax.swing.RepaintManager.paint(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Window.paint(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$1000(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at day1.example.BingoCard.paintComponent(BingoCard.java:27)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Window.paint(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$1000(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.WaitDispatchSupport$2.run(Unknown Source)
at java.awt.WaitDispatchSupport$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(Unknown Source)
at java.awt.Dialog.show(Unknown Source)
at javax.swing.JOptionPane.showOptionDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at javax.swing.JOptionPane.showMessageDialog(Unknown Source)
at day1.example.BingoCard.paintComponent(BingoCard.java:22)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at javax.swing.JLayeredPane.paint(Unknown Source)
at javax.swing.JComponent.paintChildren(Unknown Source)
at javax.swing.JComponent.paintToOffscreen(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(Unknown Source)
at javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
at javax.swing.RepaintManager.paint(Unknown Source)
at javax.swing.JComponent.paint(Unknown Source)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
at sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
at sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
at java.awt.Container.paint(Unknown Source)
at java.awt.Window.paint(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at javax.swing.RepaintManager$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
at javax.swing.RepaintManager.access$1000(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Here is my coding
这是我的编码
package BingoPackage;
import javax.swing.JComponent;
import javax.swing.JOptionPane;
import java.awt.*;
public class BingoCard extends JComponent {
public void paintComponent(Graphics g)
{
//Recover Graphics
int BValues []= new int [5];
int IValues []= new int [5];
int NValues []= new int [4];
int GValues []= new int [5];
int OValues []= new int [5];
JOptionPane.showMessageDialog(null," We will now guide you in making your very own Bingo Card");
for (int B = 0; B<BValues.length; B++)
{
String BVal = JOptionPane.showInputDialog(null, "Please enter 5 different numbers"+ "\n" + "that are in the range of 1-15");
BValues[B]=Integer.parseInt(BVal);
if (BValues[B]<1 || BValues[B]>15)
{ JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
}
int B1 = BValues [0];
int B2 = BValues [1];
int B3 = BValues [2];
int B4 = BValues [3];
int B5 = BValues [4];
if (B1==B2 || B1==B3 || B1== B4 || B1==B5 || B2==B3 || B2== B4|| B2==B5 || B3== B4 || B3== B5 || B4==B5)
{
JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
for (int I = 0; I<IValues.length; I++)
{
String IVal = JOptionPane.showInputDialog(null, "Please enter 5 different numbers"+ "\n" + "that are in the range of 16-30");
IValues[I]=Integer.parseInt(IVal);
if (IValues[I]<16 || IValues[I]>30)
{ JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
}
int I1 = IValues [0];
int I2 = IValues [1];
int I3 = IValues [2];
int I4 = IValues [3];
int I5 = IValues [4];
if (I1==I2 || I1==I3 || I1== I4 || I1==I5 || I2==I3 || I2== I4|| I2==I5 || I3== I4 || I3== I5 || I4==I5)
{
JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
for (int N = 0; N<NValues.length; N++)
{
String NVal = JOptionPane.showInputDialog(null, "Please enter 4 different numbers"+ "\n" + "that are in the range of 31-45");
NValues[N]=Integer.parseInt(NVal);
if (NValues[N]<31 || NValues[N]>45)
{ JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
}
int N1 = NValues [0];
int N2 = NValues [1];
int N3 = NValues [2];
int N4 = NValues [3];
if (N1==N2 || N1==N3 || N1== N4 || N2==N3 || N2== N4|| N3== N4)
{
JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
for (int G = 0; G<GValues.length; G++)
{
String GVal = JOptionPane.showInputDialog(null, "Please enter 5 different numbers"+ "\n" + "that are in the range of 46-60");
GValues[G]=Integer.parseInt(GVal);
if (GValues[G]<46 || GValues[G]>60)
{ JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
}
int G1 = GValues [0];
int G2 = GValues [1];
int G3 = GValues [2];
int G4 = GValues [3];
int G5 = GValues [4];
if (G1==G2 || G1==G3 || G1== I4 || G1==G5 || G2==G3 || G2== G4|| G2==G5 || G3== G4 || G3== G5 || G4==G5)
{
JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
for (int O = 0; O<OValues.length; O++)
{
String OVal = JOptionPane.showInputDialog(null, "Please enter 5 different numbers"+ "\n" + "that are in the range of 61-75");
OValues[O]=Integer.parseInt(OVal);
if (OValues[O]<61 || OValues[O]>75)
{ JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
}
int O1 = OValues [0];
int O2 = OValues [1];
int O3 = OValues [2];
int O4 = OValues [3];
int O5 = OValues [4];
if (O1==O2 || O1==O3 || O1== O4 || O1==O5 || O2==O3 || O2== O4|| O2==O5 || O3== O4 || O3== O5 || O4==O5)
{
JOptionPane.showMessageDialog(null, "You have failed to comply");
System.exit (0);
}
Graphics2D g3 = (Graphics2D) g;
g3.setColor(Color.BLACK);
Font bingoFont = new Font ("Tahoma", Font.PLAIN,69);
g3.setFont(bingoFont);
Rectangle bingosign = new Rectangle (75,10, 500, 75);
g3.draw(bingosign);
g3.drawString ("B I N G O", 110, 70);
Rectangle B1Box = new Rectangle (75, 85, 100, 100);
g3.draw(B1Box);
Rectangle B2Box = new Rectangle (75, 185, 100, 100);
g3.draw(B2Box);
Rectangle B3Box = new Rectangle (75, 285, 100, 100);
g3.draw(B3Box);
Rectangle B4Box = new Rectangle (75, 385, 100, 100);
g3.draw(B4Box);
Rectangle B5Box = new Rectangle (75, 485, 100, 100);
g3.draw(B5Box);
Rectangle I1Box = new Rectangle (175, 85, 100, 100);
g3.draw(I1Box);
Rectangle I2Box = new Rectangle (175, 185, 100, 100);
g3.draw(I2Box);
Rectangle I3Box = new Rectangle (175, 285, 100, 100);
g3.draw(I3Box);
Rectangle I4Box = new Rectangle (175, 385, 100, 100);
g3.draw(I4Box);
Rectangle I5Box = new Rectangle (175, 485, 100, 100);
g3.draw(I5Box);
Rectangle N1Box = new Rectangle (275, 85, 100, 100);
g3.draw(N1Box);
Rectangle N2Box = new Rectangle (275, 185, 100, 100);
g3.draw(N2Box);
Rectangle N3Box = new Rectangle (275, 285, 100, 100);
g3.draw(N3Box);
Rectangle N4Box = new Rectangle (275, 385, 100, 100);
g3.draw(N4Box);
Rectangle N5Box = new Rectangle (275, 485, 100, 100);
g3.draw(N5Box);
Rectangle G1Box = new Rectangle (375, 85, 100, 100);
g3.draw(G1Box);
Rectangle G2Box = new Rectangle (375, 185, 100, 100);
g3.draw(G2Box);
Rectangle G3Box = new Rectangle (375, 285, 100, 100);
g3.draw(G3Box);
Rectangle G4Box = new Rectangle (375, 385, 100, 100);
g3.draw(G4Box);
Rectangle G5Box = new Rectangle (375, 485, 100, 100);
g3.draw(G5Box);
Rectangle O1Box = new Rectangle (475, 85, 100, 100);
g3.draw(O1Box);
Rectangle O2Box = new Rectangle (475, 185, 100, 100);
g3.draw(O2Box);
Rectangle O3Box = new Rectangle (475, 285, 100, 100);
g3.draw(O3Box);
Rectangle O4Box= new Rectangle (475, 385, 100, 100);
g3.draw(O4Box);
Rectangle O5Box = new Rectangle (475, 485, 100, 100);
g3.draw(O5Box);
g3.setColor(Color.RED);
g3.fill(N3Box);
g3.setColor(Color.BLACK);
String B1String = String.valueOf(B1);
String B2String = String.valueOf(B2);
String B3String = String.valueOf(B3);
String B4String = String.valueOf(B4);
String B5String = String.valueOf(B5);
String I1String = String.valueOf(I1);
String I2String = String.valueOf(I2);
String I3String = String.valueOf(I3);
String I4String = String.valueOf(I4);
String I5String = String.valueOf(I5);
String N1String = String.valueOf(N1);
String N2String = String.valueOf(N2);
String N3String = String.valueOf(N3);
String N4String = String.valueOf(N4);
String G1String = String.valueOf(G1);
String G2String = String.valueOf(G2);
String G3String = String.valueOf(G3);
String G4String = String.valueOf(G4);
String G5String = String.valueOf(G5);
String O1String = String.valueOf(O1);
String O2String = String.valueOf(O2);
String O3String = String.valueOf(O3);
String O4String = String.valueOf(O4);
String O5String = String.valueOf(O5);
g3.drawString(B1String, 90, 160);
g3.drawString(B2String, 90, 260);
g3.drawString(B3String, 90, 360);
g3.drawString(B4String, 90, 460);
g3.drawString(B5String, 90, 560);
g3.drawString(I1String, 190, 160);
g3.drawString(I2String, 190, 260);
g3.drawString(I3String, 190, 360);
g3.drawString(I4String, 190, 460);
g3.drawString(I5String, 190, 560);
g3.drawString(N1String, 290, 160);
g3.drawString(N2String, 290, 260);
g3.drawString(N3String, 290, 460);
g3.drawString(N4String, 290, 560);
g3.drawString(G1String, 390, 160);
g3.drawString(G2String, 390, 260);
g3.drawString(G3String, 390, 360);
g3.drawString(G4String, 390, 460);
g3.drawString(G5String, 390, 560);
g3.drawString(O1String, 490, 160);
g3.drawString(O2String, 490, 260);
g3.drawString(O3String, 490, 360);
g3.drawString(O4String, 490, 460);
g3.drawString(O5String, 490, 560);
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.LIGHT_GRAY);
Font freeSpaceFont = new Font("Helvetica", Font.PLAIN,16);
g2.setFont(freeSpaceFont);
g2.drawString("Free", 305, 330);
g2.drawString("Space", 300, 350);
}
}
What is wrong? Thanks in advance.
是什么错了吗?提前谢谢。
1 个解决方案
#1
5
It seem you are getting null entry at line
看起来你在直线上得到了零元素
String BVal = JOptionPane.showInputDialog(null, "Please enter 5 different numbers"+ "\n" + "that are in the range of 1-15");
So line
直线
BValues[B]=Integer.parseInt(BVal);
is causing the exception.
Trace what you are getting BVal as input.
跟踪您将获得的BVal作为输入。
Important: Always use validation while taking input from user.
重要提示:在接收用户输入时始终使用验证。
Update: I checked further, you are taking input in multiple places. Put validation wherever needed
更新:我进一步检查，您正在多个地方进行输入。把验证的地方需要
验证参考
#1
5
It seem you are getting null entry at line
看起来你在直线上得到了零元素
String BVal = JOptionPane.showInputDialog(null, "Please enter 5 different numbers"+ "\n" + "that are in the range of 1-15");
So line
直线
BValues[B]=Integer.parseInt(BVal);
is causing the exception.
Trace what you are getting BVal as input.
跟踪您将获得的BVal作为输入。
Important: Always use validation while taking input from user.
重要提示:在接收用户输入时始终使用验证。
Update: I checked further, you are taking input in multiple places. Put validation wherever needed
更新:我进一步检查，您正在多个地方进行输入。把验证的地方需要
验证参考