java計(jì)算器代碼簡(jiǎn)易 java制作計(jì)算器代碼

編寫java程序簡(jiǎn)單計(jì)算器

主要涉及的知識(shí)點(diǎn): 類的寫法, 以及方法的調(diào)用 .建議多做練習(xí). 如果有看不懂的地方. 可以繼續(xù)追問(wèn),一起討論.

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參考代碼如下

//Number類

class?Number?{

private?int?n1;//私有的整型數(shù)據(jù)成員n1

private?int?n2;//私有的整型數(shù)據(jù)成員n2

//?通過(guò)構(gòu)造函數(shù)給n1和n2賦值

public?Number(int?n1,?int?n2)?{

this.n1?=?n1;

this.n2?=?n2;

}

//?加法

public?int?addition()?{

return?n1?+?n2;

}

//?減法

public?int?subtration()?{

return?n1?-?n2;

}

//?乘法

public?int?multiplication()?{

return?n1?*?n2;

}

//?除法?(可能除不盡,所以使用double作為返回類型)

public?double?division()?{

return?n1?*?1.0?/?n2;?//?通過(guò)n1*1.0?把計(jì)算結(jié)果轉(zhuǎn)換成double類型.

}

}

//Exam4?類

public?class?Exam4{

public?static?void?main(String[]?args)?{

Number?number=new?Number(15,?6);//創(chuàng)建Number類的對(duì)象

//下面的是調(diào)用方法得到返回值進(jìn)行輸出顯示

System.out.println("加法"+number.addition());

System.out.println("減法"+number.subtration());

System.out.println("乘法"+number.multiplication());

System.out.println("除法"+number.division());

}

}

求JAVA簡(jiǎn)易計(jì)算器代碼。

import javax.swing.SwingUtilities;

import javax.swing.JPanel;

import javax.swing.JFrame;

import javax.swing.JTextField;

import java.awt.Rectangle;

import javax.swing.JButton;

public class Calculator extends JFrame {

private static final long serialVersionUID = 1L;

private JPanel jContentPane = null;

private JTextField jTextField = null;

private JButton jButton = null;

private JButton jButton1 = null;

private JButton jButton2 = null;

private JButton jButton3 = null;

private JButton jButton4 = null;

private JButton jButton5 = null;

private JButton jButton6 = null;

private JButton jButton7 = null;

private JButton jButton8 = null;

private JButton jButton9 = null;

private JButton jButton10 = null;

private JButton jButton11 = null;

private JButton jButton12 = null;

private JButton jButton13 = null;

private JButton jButton14 = null;

private double first = 0;

private double second = 0;

private JButton jButton15 = null;

private JButton jButton16 = null;

private String way = "";

private double result = 0;

private char[] ch = new char[12];

private int i = 0;

/**

* This method initializes jTextField

*

* @return javax.swing.JTextField

*/

private JTextField getJTextField() {

if (jTextField == null) {

jTextField = new JTextField("0");

jTextField.setBounds(new Rectangle(60, 15, 234, 31));

jTextField.setHorizontalAlignment(JTextField.RIGHT);

}

return jTextField;

}

/**

* This method initializes jButton

*

* @return javax.swing.JButton

*/

private JButton getJButton() {

if (jButton == null) {

jButton = new JButton();

jButton.setBounds(new Rectangle(62, 74, 44, 37));

jButton.setText("1");

jButton.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '1';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton;

}

/**

* This method initializes jButton1

*

* @return javax.swing.JButton

*/

private JButton getJButton1() {

if (jButton1 == null) {

jButton1 = new JButton();

jButton1.setBounds(new Rectangle(119, 74, 44, 37));

jButton1.setText("2");

jButton1.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '2';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton1;

}

/**

* This method initializes jButton2

*

* @return javax.swing.JButton

*/

private JButton getJButton2() {

if (jButton2 == null) {

jButton2 = new JButton();

jButton2.setBounds(new Rectangle(176, 74, 44, 37));

jButton2.setText("3");

jButton2.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '3';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton2;

}

/**

* This method initializes jButton3

*

* @return javax.swing.JButton

*/

private JButton getJButton3() {

if (jButton3 == null) {

jButton3 = new JButton();

jButton3.setBounds(new Rectangle(62, 129, 44, 37));

jButton3.setText("4");

jButton3.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '4';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton3;

}

/**

* This method initializes jButton4

*

* @return javax.swing.JButton

*/

private JButton getJButton4() {

if (jButton4 == null) {

jButton4 = new JButton();

jButton4.setBounds(new Rectangle(119, 129, 44, 37));

jButton4.setText("5");

jButton4.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '5';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton4;

}

/**

* This method initializes jButton5

*

* @return javax.swing.JButton

*/

private JButton getJButton5() {

if (jButton5 == null) {

jButton5 = new JButton();

jButton5.setBounds(new Rectangle(176, 129, 44, 37));

jButton5.setText("6");

jButton5.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '6';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton5;

}

/**

* This method initializes jButton6

*

* @return javax.swing.JButton

*/

private JButton getJButton6() {

if (jButton6 == null) {

jButton6 = new JButton();

jButton6.setBounds(new Rectangle(62, 184, 44, 37));

jButton6.setText("7");

jButton6.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '7';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton6;

}

/**

* This method initializes jButton7

*

* @return javax.swing.JButton

*/

private JButton getJButton7() {

if (jButton7 == null) {

jButton7 = new JButton();

jButton7.setBounds(new Rectangle(119, 184, 44, 37));

jButton7.setText("8");

jButton7.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '8';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton7;

}

/**

* This method initializes jButton8

*

* @return javax.swing.JButton

*/

private JButton getJButton8() {

if (jButton8 == null) {

jButton8 = new JButton();

jButton8.setBounds(new Rectangle(176, 184, 44, 37));

jButton8.setText("9");

jButton8.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '9';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton8;

}

/**

* This method initializes jButton9

*

* @return javax.swing.JButton

*/

private JButton getJButton9() {

if (jButton9 == null) {

jButton9 = new JButton();

jButton9.setBounds(new Rectangle(233, 74, 44, 37));

jButton9.setText("+");

jButton9.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

first = Double.parseDouble(jTextField.getText());

way = "+";

ch = new char[12];

i = 0;

jButton16.setEnabled(true);

}

});

}

return jButton9;

}

/**

* This method initializes jButton10

*

* @return javax.swing.JButton

*/

private JButton getJButton10() {

if (jButton10 == null) {

jButton10 = new JButton();

jButton10.setBounds(new Rectangle(290, 74, 44, 37));

jButton10.setText("-");

jButton10.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

first = Double.parseDouble(jTextField.getText());

way = "-";

ch = new char[12];

i = 0;

jButton16.setEnabled(true);

}

});

}

return jButton10;

}

/**

* This method initializes jButton11

*

* @return javax.swing.JButton

*/

private JButton getJButton11() {

if (jButton11 == null) {

jButton11 = new JButton();

jButton11.setBounds(new Rectangle(233, 129, 44, 37));

jButton11.setText("*");

jButton11.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

first = Double.parseDouble(jTextField.getText());

way = "*";

ch = new char[12];

i = 0;

jButton16.setEnabled(true);

}

});

}

return jButton11;

}

/**

* This method initializes jButton12

*

* @return javax.swing.JButton

*/

private JButton getJButton12() {

if (jButton12 == null) {

jButton12 = new JButton();

jButton12.setBounds(new Rectangle(290, 129, 44, 37));

jButton12.setText("/");

jButton12.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

first = Double.parseDouble(jTextField.getText());

way = "/";

ch = new char[12];

i = 0;

jButton16.setEnabled(true);

}

});

}

return jButton12;

}

/**

* This method initializes jButton13

*

* @return javax.swing.JButton

*/

private JButton getJButton13() {

if (jButton13 == null) {

jButton13 = new JButton();

jButton13.setBounds(new Rectangle(233, 184, 44, 37));

jButton13.setText("=");

jButton13.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

second = Double.parseDouble(jTextField.getText());

if (way.equals("")){

jTextField.setText(""+second);

}

if (way.equals("+")){

result = first + second;

jTextField.setText(""+result);

}

if (way.equals("-")){

result = first - second;

jTextField.setText(""+result);

}

if (way.equals("*")){

result = first * second;

jTextField.setText(""+result);

}

if(way.equals("/")){

if (second != 0){

result = first / second;

jTextField.setText(""+result);

}else{

jTextField.setText("error");

}

}

jButton16.setEnabled(true);

}

});

}

return jButton13;

}

/**

* This method initializes jButton14

*

* @return javax.swing.JButton

*/

private JButton getJButton14() {

if (jButton14 == null) {

jButton14 = new JButton();

jButton14.setBounds(new Rectangle(290, 184, 44, 37));

jButton14.setText("C");

jButton14.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

jTextField.setText("0");

first = 0;

second = 0;

way = "";

ch = new char[12];

i = 0;

jButton16.setEnabled(true);

}

});

}

return jButton14;

}

/**

* This method initializes jButton15

*

* @return javax.swing.JButton

*/

private JButton getJButton15() {

if (jButton15 == null) {

jButton15 = new JButton();

jButton15.setBounds(new Rectangle(62, 231, 102, 26));

jButton15.setText("0");

jButton15.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

ch[i] = '0';

jTextField.setText(new String(ch).trim());

i++;

}

});

}

return jButton15;

}

/**

* This method initializes jButton16

*

* @return javax.swing.JButton

*/

private JButton getJButton16() {

if (jButton16 == null) {

jButton16 = new JButton();

jButton16.setBounds(new Rectangle(176, 231, 44, 26));

jButton16.setText(".");

jButton16.addActionListener(new java.awt.event.ActionListener() {

public void actionPerformed(java.awt.event.ActionEvent e) {

if(ch[0] == 0){

ch[i] = '0';

ch[i+1] = '.';

i++;

}else{

ch[i] = '.';

}

jTextField.setText(new String(ch).trim());

i++;

jButton16.setEnabled(false);

}

});

}

return jButton16;

}

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

SwingUtilities.invokeLater(new Runnable() {

public void run() {

Calculator thisClass = new Calculator();

thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

thisClass.setVisible(true);

}

});

}

/**

* This is the default constructor

*/

public Calculator() {

super();

initialize();

}

/**

* This method initializes this

*

* @return void

*/

private void initialize() {

this.setSize(356, 298);

this.setContentPane(getJContentPane());

this.setTitle("計(jì)算器");

this.setResizable(false);

}

/**

* This method initializes jContentPane

*

* @return javax.swing.JPanel

*/

private JPanel getJContentPane() {

if (jContentPane == null) {

jContentPane = new JPanel();

jContentPane.setLayout(null);

jContentPane.add(getJTextField(), null);

jContentPane.add(getJButton(), null);

jContentPane.add(getJButton1(), null);

jContentPane.add(getJButton2(), null);

jContentPane.add(getJButton3(), null);

jContentPane.add(getJButton4(), null);

jContentPane.add(getJButton5(), null);

jContentPane.add(getJButton6(), null);

jContentPane.add(getJButton7(), null);

jContentPane.add(getJButton8(), null);

jContentPane.add(getJButton9(), null);

jContentPane.add(getJButton10(), null);

jContentPane.add(getJButton11(), null);

jContentPane.add(getJButton12(), null);

jContentPane.add(getJButton13(), null);

jContentPane.add(getJButton14(), null);

jContentPane.add(getJButton15(), null);

jContentPane.add(getJButton16(), null);

}

return jContentPane;

}

} // @jve:decl-index=0:visual-constraint="437,27"

哥們！這是用eclipse中的visual editor做的，所以代碼比較多，復(fù)制粘貼不方便，我可以發(fā)你郵箱。你把代碼打上去，一樣能運(yùn)行的！??！

求大神發(fā)個(gè)完整簡(jiǎn)單的java計(jì)算器代碼，

public static void main(String[] args) {

System.out.println("簡(jiǎn)單計(jì)算器");

boolean flag=true;//while循環(huán)是否繼續(xù)，true繼續(xù)循環(huán)，false停止循環(huán)

System.out.println("請(qǐng)輸入第一個(gè)數(shù)字");

while(flag){

Scanner scan = new Scanner(System.in);

String bh=scan.next();

try {

double num = Double.parseDouble(bh);

System.out.println("請(qǐng)輸入符號(hào)(+、-、*、/)");

while(1==1){

String fh=scan.next();

if("+".equals(fh) || "-".equals(fh) || "*".equals(fh) || "/".equals(fh)){

System.out.println("請(qǐng)輸入第二個(gè)數(shù)字");

while(1==1){

String bh2=scan.next();

try {

double num2 = Double.parseDouble(bh2);

double num3=0;

if("+".equals(fh)){

num3=num+num2;

}else if("-".equals(fh)){

num3=num-num2;

}else if("*".equals(fh)){

num3=num*num2;

}else if("/".equals(fh)){

num3=num/num2;

}

System.out.println(num3);

break;

} catch (Exception e) {

System.out.println("請(qǐng)輸入第二個(gè)正確的數(shù)字");

continue;

}

}

break;

}else{

System.out.println("請(qǐng)輸入正確的符號(hào)(+、-、*、/)");

continue;

}

}

System.out.println("是否繼續(xù)運(yùn)算:輸入Y或者y繼續(xù)，輸入其它任意字符退出");

String yn=scan.next();

if("Y".equals(yn) || "y".equals(yn)){

continue;

}else{

System.out.println("運(yùn)算結(jié)束");

break;

}

}catch (NumberFormatException e) {//輸入非數(shù)字類型時(shí)

System.out.println("請(qǐng)輸入第一個(gè)正確的數(shù)字");

continue;

}

}

}

文章題目：java計(jì)算器代碼簡(jiǎn)易 java制作計(jì)算器代碼
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