如何从 GUI Jbutton 运行主类?
我创建了一个主类(类文件)。就我而言,它工作正常。现在,我正在创建一个 GUI,其中包含一个启动该类文件的按钮。如何编写 actionListener 的代码才能运行 mainProgram 类?
这是主类:
import java.io.*;
import java.util.*;
public class MainProgram
{
public static void main (String args[]) throws IOException
{
//Declare variables
Scanner in = new Scanner (System.in); // Scanner used for user input
BufferedReader inputQuote;
BufferedReader inputTheme;
BufferedReader inputCharacterAnalysis;
BufferedReader inputSignificance;
BufferedReader inputPlotEnhancement;
BufferedReader inputSpeaker;
String [][] quotes;
String text;
int quoteSelection;
int analysisSelection;
int howMany=0;
int count;
//Count the number of lines in a text file
FileReader fr = new FileReader ("CrucibleQuotations.txt");
LineNumberReader ln = new LineNumberReader (fr);
while (ln.readLine() != null)
{
howMany++;
}
//import information from the text file
inputQuote = new BufferedReader (new FileReader ("CrucibleQuotations.txt"));
inputTheme = new BufferedReader (new FileReader("CrucibleTheme.txt"));
inputCharacterAnalysis = new BufferedReader (new FileReader("CrucibleCharacterAnalysis.txt"));
inputSignificance = new BufferedReader (new FileReader("CrucibleSignificance.txt"));
inputPlotEnhancement = new BufferedReader (new FileReader("CruciblePlotEnhancement.txt"));
inputSpeaker = new BufferedReader (new FileReader("CrucibleSpeaker.txt"));
//Create array based on how many quotes available in the text file
quotes = new String [howMany][6];
//Store quote information in the array and display the list of quotations
for (int i=0; i<howMany; i++)
{
quotes [i][0] = inputQuote.readLine();
System.out.println (i+1 + ") " + quotes [i][0]);
quotes [i][1] = inputTheme.readLine();
quotes [i][2] = inputCharacterAnalysis.readLine();
quotes [i][3] = inputSignificance.readLine();
quotes [i][4] = inputPlotEnhancement.readLine();
quotes [i][5] = inputSpeaker.readLine();
}
//Ask user to choose the quote they want to analyze
System.out.println ("Choose a quotation by inputting the number. If the quotation you would like to analyse is unavailable, you may create your own by entering the number 0. ");
quoteSelection = in.nextInt ();
if (quoteSelection!=0)
{
//Show user selections to analyze
System.out.println ("Choose your analysis");
System.out.println ("1. Theme");
System.out.println ("2. Character Analysis");
System.out.println ("3. Significance");
System.out.println ("4. Plot Enhancement");
System.out.println ("5. Speaker");
analysisSelection = in.nextInt ();
//Display the analysis
if (analysisSelection <= 5 || analysisSelection > 0)
{
System.out.println (quotes [quoteSelection-1][analysisSelection]);
}
}
这将是我的 GUI 类
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.BorderLayout;
import java.awt.GridLayout;
public class GUI
{
public GUI()
{
JFrame frame = new JFrame ("Quotes");
frame.setSize(500, 500);
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
cButton.addActionListener (new ActionListener() {
public void actionPerformed (ActionEvent ae) {
try{
MainProgram.main (new String[]);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public static void main (String [] args)
{
new GUI();
}
}
I've created a main class (class file). As fas as i'm concerned, it works properly. Now, i'm creating a GUI which contains a button to launch that class file. How do I write the code for the actionListener in order to run mainProgram class?
This is the main class:
import java.io.*;
import java.util.*;
public class MainProgram
{
public static void main (String args[]) throws IOException
{
//Declare variables
Scanner in = new Scanner (System.in); // Scanner used for user input
BufferedReader inputQuote;
BufferedReader inputTheme;
BufferedReader inputCharacterAnalysis;
BufferedReader inputSignificance;
BufferedReader inputPlotEnhancement;
BufferedReader inputSpeaker;
String [][] quotes;
String text;
int quoteSelection;
int analysisSelection;
int howMany=0;
int count;
//Count the number of lines in a text file
FileReader fr = new FileReader ("CrucibleQuotations.txt");
LineNumberReader ln = new LineNumberReader (fr);
while (ln.readLine() != null)
{
howMany++;
}
//import information from the text file
inputQuote = new BufferedReader (new FileReader ("CrucibleQuotations.txt"));
inputTheme = new BufferedReader (new FileReader("CrucibleTheme.txt"));
inputCharacterAnalysis = new BufferedReader (new FileReader("CrucibleCharacterAnalysis.txt"));
inputSignificance = new BufferedReader (new FileReader("CrucibleSignificance.txt"));
inputPlotEnhancement = new BufferedReader (new FileReader("CruciblePlotEnhancement.txt"));
inputSpeaker = new BufferedReader (new FileReader("CrucibleSpeaker.txt"));
//Create array based on how many quotes available in the text file
quotes = new String [howMany][6];
//Store quote information in the array and display the list of quotations
for (int i=0; i<howMany; i++)
{
quotes [i][0] = inputQuote.readLine();
System.out.println (i+1 + ") " + quotes [i][0]);
quotes [i][1] = inputTheme.readLine();
quotes [i][2] = inputCharacterAnalysis.readLine();
quotes [i][3] = inputSignificance.readLine();
quotes [i][4] = inputPlotEnhancement.readLine();
quotes [i][5] = inputSpeaker.readLine();
}
//Ask user to choose the quote they want to analyze
System.out.println ("Choose a quotation by inputting the number. If the quotation you would like to analyse is unavailable, you may create your own by entering the number 0. ");
quoteSelection = in.nextInt ();
if (quoteSelection!=0)
{
//Show user selections to analyze
System.out.println ("Choose your analysis");
System.out.println ("1. Theme");
System.out.println ("2. Character Analysis");
System.out.println ("3. Significance");
System.out.println ("4. Plot Enhancement");
System.out.println ("5. Speaker");
analysisSelection = in.nextInt ();
//Display the analysis
if (analysisSelection <= 5 || analysisSelection > 0)
{
System.out.println (quotes [quoteSelection-1][analysisSelection]);
}
}
This would be my GUI class
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.BorderLayout;
import java.awt.GridLayout;
public class GUI
{
public GUI()
{
JFrame frame = new JFrame ("Quotes");
frame.setSize(500, 500);
frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
cButton.addActionListener (new ActionListener() {
public void actionPerformed (ActionEvent ae) {
try{
MainProgram.main (new String[]);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public static void main (String [] args)
{
new GUI();
}
}
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请记住调用
,否则您的 JFrame 将不会显示。
至于 ActionListener 代码,您必须为字符串数组维度添加 [0],例如:
Remember to call
or your JFrame will not be shown.
As for the ActionListener code, you've to add [0] for the String Array dimension such as: