java calculator code

Original: Java Swing development of the simplest calculator source codeSource code: Http://www.zuidaima.com/share/1550463496948736.htmA simple calculator written in Java Swing/*** @author www.zuidaima.com*/package com.zuidaima.swing;import java.awt.borderlayout;import java.a

=============JTextField textarea=new JTextField (20);Textarea.sethorizontalalignment (Jtextfield.right);Frame.add (textarea);JPanel JP = new JPanel ();Dimension dimen = new Dimension (225,225);Jp.setpreferredsize (dimen);Frame.add (JP);GridLayout gl = new GridLayout (bis);Jp.setlayout (GL);===========add listenre==============================ActionListener action_listener=new MyListener (TEXTAREA);ActionListener string_listener=new Stringlistener (TEXTAREA);===========to instance control========

The first job in Java programming: source code calculator,Objective: (1) to get started with a language, you need to write at least 20 thousand lines of code. Then, we compile a program for calculating the number of lines of code to motivate ourselves to move forward. (2) un

normallines = 0;/** * @param args */public static void main (string[ ] args) {file F = new File ("C:\\users\\administrator\\workspaces\\myeclipse 8.5\\tyh\\src\\iotest\\ Staticscodeingline.java ");//note path Sumcode (f);} private static void Sumcode (file file) {BufferedReader br = null; Boolean comment = false; try {br = new BufferedReader ( New FileReader (file)); String line = ""; try {while (line = Br.readline ())! = null) {line = Line.trim (); if (Line.matches ("^[\\s[^\\n]]*$")) {Whiteli

In fact, this program is the first sophomore semester in Java, a normal job, at that time only required to produce a few random matrices and the calculation of these matrices.So I didn't go to the present so rich and practical function. But at that time was quite want to do, but some do not know how to achieve.Now is the junior semester, before soon after the end of the exam, idle to the matter before the fall of this thing to fill up, but also a big

The use of methods for objects and properties in Java, simple to write a case Import Java.util.Scanner; Class Calculste {int A;//define two integer int b; String option; Defines the receive operator string public void count () {//To determine the operator switch (option) {case "+": System.out.println ("Compute and:" +a+ "+" +b+ "=" + (a+b)); Break Case "-": System.out.println ("Calculated difference:" +a+ "-" +b+ "=" + (a-b)); B

Simple JS calculator implementation code and js calculator code Look at the calculators in your cell phone. They are divided into common calculators and scientific calculators. If you think your head is not big enough, you can implement a normal version (supporting basic continuous operations such as positive, negativ

Pure javascript code to implement the calculator function (three methods), javascript Calculator Today, I will share with you a calculator program written in pure javascript code, which can be used in many industries, such as renovation budget and loan interest rates. First,

1. The display name of the key on the calculator1.0 InheritanceJFrameclass Public class Calculate extends JFrame {}1.1 Defining constants The display name of the key on the/** calculator */ Public Final String[] KEYS = {"7", "8", "9", "/", "sqrt", "4", "5", "6", "*", "%", "1", "2", "3", "-", "1/x", "0", "+/-", ".", "+", "= " };The display name of the function key on the/** calculator */ Public Final Strin

The Set calculator assists Java in processing conditional filtering of structured text, and java structuring Using Java to filter data in text files by conditions may cause the following troubles: 1. files are not databases and cannot be accessed using SQL. When the filter conditions change, you must rewrite the

The Set calculator assists java in processing the alignment connection of structured text, and java structuring The database has associated statements to facilitate alignment and join operations. However, sometimes data is stored in text files. To use JAVA for direct computation, you need to write a large number of loo

The Set calculator assists Java in processing grouping and summarizing structured text, and java structuring Using Java to group and summarize style files may cause the following troubles: 1. files are not databases and cannot be accessed using SQL. When the grouping and summary expressions change, you can only rewrite

The Set calculator assists java in processing Structured Text Data Reading, java structured JAVA only provides the most basic data reading functions such as specifying delimiters. Other common functions must be implemented at the underlying layer. For example: reads a specified column by column name, the sequence of th

This project course uses the Java language to complete a simple calculator. You will use the Java Swing graphics components and so on. first, the experiment introduction The experiment produced a simple arithmetic calculator that will be developed using Java swing. 1.1 Kno

The Set calculator assists java in processing the set operation of structured text, and java structuring JAVA does not directly support set operations. Therefore, you must use nested loops to perform set operations such as intersection, union, and difference sets between text files. If there are many files, or if the f

The Java teacher arranges the homework, wants us to compile a calculator, and must have the parenthesis function ... The disgusting, more than 600 lines of code, debugging to debug to finally be able to use, but estimated there are bugs.There is a bug I know, but it does not affect normal use: there can be a leading zero, that is, there can be 0087 of such number

/* The code used in the article is only a part of the source can be contacted by email me [email protected]*/Some time ago just to help classmates with MFC wrote a calculator, now learn Java graphics development, try to water a calculator out. (can be said to be a water-no-water ca