ipushmycar, on 11 December 2012 - 06:18 AM, said:

ok that's really good but it's not my problem it's in class college it breaks in the pint that i can't understand ???

 
import javax.swing.JOptionPane;


public class College extends Person {
	
	
	String name;
	Student [] s=new Student [1000];
	Administrator [] a=new Administrator [135];
	Staff [] st=new Staff[200];
	
	
	public void input (){ 
		int i=0;
		int y=0;
		int z=0;
		String check=JOptionPane.showInputDialog("Would you like to input student,administrator or staff");
		if(check == "student" )
		{
		while (i<1000)
		{
		s[i].setName(JOptionPane.showInputDialog("Enter student's name"));
		String status=JOptionPane.showInputDialog("Enter "+s[i].getName()+"'s status"+"\nfreshman,sophomore,junior or senior");
		if(status=="freshman")
			s[i].setclassStatus("Freshman");
		else if (status=="sophomore")
			s[i].setclassStatus("Sophomore");
		else if (status=="senior")
			s[i].setclassStatus("Senior");
		else if (status=="junior")
			s[i].setclassStatus("Junior");
		else 
			s[i].setclassStatus("Wrong status");
		
		
		s[i].setAddress(JOptionPane.showInputDialog("Enter "+s[i].getName()+"'s address"));
		s[i].setEmail(JOptionPane.showInputDialog("Enter "+s[i].getName()+"'s e-mail address"));
		String pho=JOptionPane.showInputDialog("Enter "+s[i].getName()+"'s phone");
		s[i].setPhone(Integer.parseInt(pho));
		i++;
	}
		}
	
	
	else if(check=="staff")
	{
		while (y<200 && st[y].getPhone()>0)
		{
		st[y].setName(JOptionPane.showInputDialog("Enter the name of staff"));
		st[y].setTitle(JOptionPane.showInputDialog("Enter "+st[y].name+"'s"+" title"));
		st[y].address=JOptionPane.showInputDialog("Enter "+st[y].name+"'s"+" address");
		st[y].emailadrress=JOptionPane.showInputDialog("Enter "+st[y].name+"'s"+" e-mail address");
		String pho=JOptionPane.showInputDialog("Enter "+st[y].name+"'s"+" phone");
		st[y].phone=Integer.parseInt(pho); 
		String Office=JOptionPane.showInputDialog("Enter "+st[y].name+"'s"+" office number");
		st[y].officeNum=Integer.parseInt(Office);
		String Sal=JOptionPane.showInputDialog("Enter "+st[y].name+"'s"+"salary");
		st[y].salary=Integer.parseInt(Sal); 
		y++;
	   }
	}
	else if(check=="administrator")
	{
		while (z<135 && a[z].phone>0)
		{
		a[z].name=JOptionPane.showInputDialog("Enter the name of Administrator");
		a[z].address=JOptionPane.showInputDialog("Enter "+a[z].name+"'s"+" address");
		a[z].emailadrress=JOptionPane.showInputDialog("Enter "+a[z].name+"'s"+" e-mail address");
		String pho=JOptionPane.showInputDialog("Enter "+a[z].name+"'s"+" phone");
		a[z].phone=Integer.parseInt(pho); 
		String Office=JOptionPane.showInputDialog("Enter "+a[z].name+"'s"+" office number");
		a[z].officeNum=Integer.parseInt(Office);
		String Ohours=JOptionPane.showInputDialog("Enter "+a[z].name+"'s"+" office hours");
		a[z].officeHours=Integer.parseInt(Ohours); 
		a[z].rank =JOptionPane.showInputDialog("Enter "+a[z].name+"'s"+" rank"); 
		String Sal=JOptionPane.showInputDialog("Enter "+a[z].name+"'s"+"salary");
		a[z].salary=Integer.parseInt(Sal); 
		z++;

	}
	}
	}
	
	
}

Sorry , i forget to mention that break in this line after

 
 		String check=JOptionPane.showInputDialog("Would you like to input student,administrator or staff");