import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JTextField;class Stack_Float { float nums[]; int top; Stack_Float() { nums = new float[50]; top = -1; } boolean IsEmpty() { if (top == -1) return t...

//import java.awt.Button;import java.awt.Color;import java.awt.Rectangle;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.FocusEvent;import java.awt.event.FocusListener;import java.awt.event.KeyEvent;import java.awt.event.KeyListener;import java.awt.eve...