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7年前关闭。
我想弄清楚我的代码出了什么问题，并帮助我理解素数计算和素数JFrame的问题。
由于某种原因，计算只说1-100的质数是
我拿出system.exit(0);，现在我需要点击所有数字，然后退出。我希望达到的目标是得到一个列出所有质数1-100的列表。
然后，通过编码的素数计算，我需要制作素数JFrame。我有太多错误，这是我的第一个问题，其次，由于这些错误，我无法运行项目来查看它。
我已经将我的代码发布到素数计算和JFrame上。任何帮助找出发生了什么/错误的帮助将不胜感激。
*********************************************************************************
//Prime Numbers Java Swing JFrame
**********************************************************************************
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ProgrammingAssignment8 extends JFrame
implements ActionListener
{
//DECLARE BUT DO NOT INSTANTIATE
private JButton calculate;
private JButton clear;
private JButton exit;
//PANELS
private JPanel jpnlMain = new JPanel();
private JPanel jpnlTop = new JPanel();
private JPanel jpnlCenter = new JPanel();
private JPanel jpnlBotton = new JPanel();
private JScrollPane scrollingResult;
//DECLARE JFRAME COMPONENTS
private JLabel jlblName, jlblMaxTest;
private JTextField jtfName, jtfMaxTest;
private JTextArea jtaName, jtaMaxNumbers;
private JButton jbutCalculate, jbutClear, jbutExit;
private CalculateButtonHandler calculateHandler;
private ClearButtonHandler clearHandler;
private ExitButtonHandler exitHandler;
/**
* @param args
*/
//CLASS CONSTRUCTOR
public ProgrammingAssignment8 (String sTitle)
{
//PREPARE THE JFRAME/WINDOW
super(sTitle);
//SET TITLE AND SIZE
setTitle(sTitle);
setSize(400,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//SET THE LAYOUT
jpnlMain.setLayout(new GridLayout(3,3,5,5));
//INSTANTIATE THE JBUTTONS WITH THE PASSED CAPTION AND COLOR AND ADD TO JPANEL
//PUT INTO A METHOD FOR EFFICIENCY AND TO AVOID REPEATING ALL THE CODE
jbtnCalculate = instantiateJButton("Calculate", Color.red);
jbtnClear = instantiateJButton("Clear", Color.blue);
jbtnExit = instantiateJButton("Exit", Color.black);
//INSTANTIATE THE JLABEL COMPONENTS
jlblName = new JLabel ("");
//PREPARE THE CONTAINER
Container ca = getContentPane();
}
set visible(true);
//END CONSTRUCTOR
private JButton instantiateJButton(String, sInCaption, Color inColor)
{
JButton jbtnButton = new JButton(sInCaption);
jbtnButton.setActionCommand(sInCaption);
jbtnButton.addActionListener(this);
jbtnButton.setForeground(inColor);
jbtnButton.setFont(fontChosenFont);
jpnlMain.add(jbutnButton);
return jbtnButton;
//END INSTANTIATE JBUTTON
//CLASS EVENT HANDLER
public void actionPerformed(java.awt.event.ActionEvent e)
{
//FIND OUT WHICH BUTTON WAS PRESSED BY USING THE ACTION COMMAND VALUE
String sActionCommand = e.getActionCommand();
//FROM THE ACTIONEVENT OBJECT, GET AN INSTANCE OF THE JBUTTON THAT WAS PRESSED
JButton jbtnSource = (JButton) e.getSource();
jbtnSource.setEnabled(false);
//LET THE USER KNOW WHAT BUTTON WAS CLICKED
JOptionPane.showMessageDialog(null, "You pressed the "" sActionCommand + " button", this.getTitle(), JOptionPane.INFORMATION_MESSAGE);
}
//END ACTIONPERFORMED (java.awt.event.ActionEvent e)
//EXECUTION STARTING POINT
public static void main(String[] args)
{
ProgrammingAssignment8 = new ProgrammingAssignment8("Instantiates with a Method");
}
//END main(String[] args)
}
//END ProgrammingAssignment8 CLASS
***********************************************************************************
PRIME NUMBERS CALCULATIONS
***********************************************************************************
import javax.swing.JOptionPane;
public class ProgrammingAssignment7
{
/**
* @param args
* @return
*/
public static void main(String[] args)
{
//Scanner Scan = new Scanner (System.in);
// TODO Auto-generated method stub
//DECLARE VARIABLES
int x = 1;
int i = 1;
int iNumber = 1;
boolean bNotPrime = false;
boolean bIsPrime = true;
int iNumberToTest;
int iPrimeCheck;
int iCounter;
int iResult = 1;
int iFact = 1;
int iLimit = 100;
String OutputStr = null;
System.out.println("Prime numbers between 1 and " + iLimit);
//loop through the numbers one by one
for(i=1; i < 100; i++)
{
bIsPrime = true;
//check to see if the number is prime
for(int j = 2; j < i ; j++){
if(i % j == 0){
bIsPrime = false;
break;
}
}
// print the number
if(bIsPrime)
OutputStr = "The Prime Numbers of 1 - 100 are: " + i + "\n";
JOptionPane.showMessageDialog(null, OutputStr, "PRIME NUMBERS", JOptionPane.INFORMATION_MESSAGE);
//System.out.print(i + "\n" );
//LISTS NUMBERS 1 THROUGH 100, INITIALIZE INTEGER NAMED I, IF IT IS LESS THAN OR EQUAL TO 100 THEN ADD ONE TO THE LOOP
/* for (int i=1; i<=100; i++)
{
System.out.println(i);
}
/* iNumber = 7;
for (iNumber = 1; iNumber <= 100; iNumber++)
iResult = iNumber / 1;
System.out.println(iResult);
/* for ( iNumber = 2; iNumber <= 100; iNumber++ )
{
if ( iNumber % iNumber == 0 )
{
bIsPrime = false;
break;
}
}
return bIsPrime;
}
*/
/* iNumber = 1;
while (iNumber < 100) iNumber++;
{
System.out.print(iNumber + " ");
System.out.println();
for (iNumber = iNumber - 1; iNumber > 2; iNumber++)
{ //divides the number by each number less than the number itself and also greater than 1 (because 1 is a factor of every number, and every number is a factor of itself)
if (iNumber % iNumber != 0)
System.out.println(iNumber + " is a prime number.");
{ //else if the number is evenly divisible by a number other than itself and 1 (we weeded out those cases in the above for statement), then it sets the boolean to be true, and breaks the for loop
bNotPrime = false;
iNumber = 1;
}
}
if (bIsPrime = true)
{ //if the number is not not a prime, then it prints the number and the for loop moves on
}
else if (bNotPrime = false)
{ //otherwise the for loop moves on
System.out.println(iNumber + " is not a prime number.");
*/
}
}
}
参考方案
set visible(true);在构造函数之外，并且不是有效的方法名称，它应该是setVisible(true);，向上移动，使其出现在当前上方的}之前...private JButton instantiateJButton(String, sInCaption, Color inColor)不是有效的方法签名，您在,后面添加了一个String，它不需要是它，应该是private JButton instantiateJButton(String sInCaption, Color inColor)JOptionPane.showMessageDialog(null, "You pressed the "" sActionCommand + " button", this.getTitle(), JOptionPane.INFORMATION_MESSAGE);缺少+，并且有太多"。我认为应该是JOptionPane.showMessageDialog(null, "You pressed the " + sActionCommand + " button", this.getTitle(), JOptionPane.INFORMATION_MESSAGE);ProgrammingAssignment8 = new ProgrammingAssignment8("Instantiates with a Method");不是有效的分配，您实际上没有将值分配给任何东西...类似ProgrammingAssignment8 assignment = new ProgrammingAssignment8("Instantiates with a Method");的东西可以解决这个问题。
以下不是有效的评论...
***********************************************************************************
PRIME NUMBERS CALCULATIONS
***********************************************************************************
这是...
/***********************************************************************************
PRIME NUMBERS CALCULATIONS
***********************************************************************************/
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