Dear bosses, I through the class object is the purpose of an array to store the contents of the text box, but why I this writing error? Thanks for your advice

 public void actionPerformed (an ActionEvent e) {
int i=0; 
Student [] st=new Student [100]. 
JButton jb=(JButton) um participant etSource (); 
If (jb==jbSingUp) {//button to give the corresponding response of the judgment in accordance with 

JtfName. SetText (" "); 
JPF. SetText (" "); 
JtfEmail. SetText (" "); 

{} else if (jb==jbReset) 
St [I]. Name=jtfName. GetText (). The trim ();//get the user input information 
St [I]. Id=JPF. GetText (). The trim (); 
St [I]. Grade=Double. ParseDouble (jtfEmail. The getText (). The trim ()); 
StringBuffer sb=new StringBuffer (); 
JtfName. SetText (" "); 
JPF. SetText (" "); 
JtfEmail. SetText (" "); 
Sb. Append (st [I] name + "" + st [I]. [I] id +" "+ st grade +" \ r \ n ");//to the user input file output information 
A Boolean flag=saveInfo (sb. ToString ()); 
If (flag) {
JOptionPane. ShowMessageDialog (null, "entry success");//prompt the user for 
i++; 
} else {
JOptionPane. ShowMessageDialog (null, "school failure," "I/o error", JOptionPane. ERROR_MESSAGE); 
} 
} 
} 

CodePudding user response:

refer to the original poster A991124 response:

, ladies and gentlemen, my purpose is through the class object array to store the contents of the text box, but why I this writing error? Thanks for your advice

Student [] st=new Student [100]. Here only initializes the Student arrays, array of each class also needs to initialize the

Additional st [I]=new Student ();

Otherwise, you must be an error,

CodePudding user response:

reference 1st floor qq_39936465 response:

Quote: refer to the original poster A991124 response:

Dear bosses, I through the class object is the purpose of an array to store the contents of the text box, but why I this writing error? Thanks for your advice

Student [] st=new Student [100]. Here only initializes the Student arrays, array of each class also needs to initialize the

Additional st [I]=new Student ();

Otherwise you must be an error,

Eldest brother, still I can't

CodePudding user response:

refer to the second floor A991124 response:

eldest brother, still I can't

Do not want to see you how to write the student class structure, the student class post