java tip 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

, preview the following:Let's look at how easy it is to complete the Windows project based on the existing phone interface design. So, first I copy the page layout code in the MainPage.xaml in the phone, you can see the following effect:While there is a lot of free space on our interface, we can see that our XAML controls in the phone are also available here.In addition to the XAML code, the background

Java. util. concurrent package source code reading 23 Fork/Join framework Fork tip, forkjoin The previous article has been tracking the pushTask method of ForkJoinWorkerThread, and there is still no way to explain the Fork principle. Let's take a look at the run method of ForkJoinWorkerThread: Public void run () {Throwable exception = null; try {// initialize the

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 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