What changes do i need to make for the program below to not require space between each character in the math problem?

import java.util.EmptyStackException;import java.util.Stack;import javax.swing.JOptionPane;

public class InfixExpression{Stack st1;Stack st2;InfixExpression(){st1=new Stack();st2=new Stack();}public int findResult(String exp) throws ArithmeticException{boolean f=false;try{String t[]=exp.split(" ");for(int i=0;i

ans= q+p;

st1.push(ans+"");

}

else if(op=='-') {

ans= q-p;

st1.push(ans+""); }

else if(op=='*'){

ans= q*p;

st1.push(ans+"");}

else if(op=='/'){

ans=q/p;

st1.push(ans+"");}}}

catch(EmptyStackException e){

f=true;}

if(f==false)

return Integer.parseInt(st1.pop());

else

return -1;}

boolean checkHighPrecedence(char top, char c){

int tp=-1;

int cp=-1;

if(top == '+' || top == '-'){

tp=0;}

if(top == '*' || top == '/' || top== '%'){

tp=1;}

if(c == '+' || c == '-'){

cp=0;}

if(c == '*' || c == '/' ){

cp=1;}

if(tp>=cp)

return true;

else

return false;}}

import java.awt.FlowLayout;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.EmptyStackException;import java.util.Stack;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.SwingConstants;

public class GUI extends JFrame implements ActionListener{

JTextField in;JLabel inl,rel;JPanel ip,rp;JButton button;Stack