java上机完整

import java.util.Scanner;publicclass test1 {publicstaticvoid main(String[] args) {System.out.println("输入一个正整数");Scanner in = new Scanner(System.in);int n = in.nextInt();//以上两句为java输入一般用的语句int sum = 0;for (int i = 1; i <= n; i++) {sum = sum + i;}System.out.println("sum=" + sum);}}import java.util.Scanner;publicclass test2 {publicstaticvoid main(String[] args) { Scanner in = new Scanner(System.in);int[] n =newint[10];int max,min,temp;System.out.println("请输入10个数");max=min=n[0]=in.nextInt();for (int i = 1; i < 10; i++) {n[i]=in.nextInt();if(n[i]>max)max=n[i];if(n[i]<min)min=n[i];}System.out.println("最大值为："+max);System.out.println("最小值为："+min);}}import java.util.Arrays;publicclass vector {float [] v; //属性public vector(float[] v) {this.v=v;//构造函数}public vector add(vector a)throws Exception {//传进来的是这个类的对象if(v.length!=a.v.length)thrownew Exception("向量维数不同");//如果维数不同，抛出异常for (int j = 0; j <v.length; j++) { //做一个循环，让向量的每个分量都相加v[j]=a.v[j]+v[j];}//向量分量相加，v[j]为实例化后这个类的一个成员变量，//a为这个类的一个对象，所以用a.v[j]为a这个对象对应的向量returnthis;}publicfloat dotProduct(vector a) throws Exception {if(v.length!=a.v.length)thrownew Exception("向量维数不同");//如果维数不同，抛出异常float dot=0;for (int i = 0; i <v.length; i++) {dot+=a.v[i]*v[i];}//同上addreturn dot; //这个是算向量积，所以返回的是得到的浮点数结果}public String toString() {//tostring函数只要返回值String s ="(";//先加个括号for (int i = 0; i <v.length - 1; i++) {s = s +String.format("%10.4f",v[i])+ ",";//依次在字符串s中加前n-1个向量元素，并加上逗号}//String.format("%10.4f",v[i]) format为string类的一个方法，作用是：使用指定的格式字符串和参数返回一个格式化字符串s =s+String.format("%10.4f",v[v.length-1])+")";return s;}publicstaticvoid main(String[] args) {float v1[]={(float) 1.1,(float) 2.2,(float) 3.3,(float) 4.4,(float) 5.5};float v2[]={(float) 1.1,(float) 2.2,(float) 3.3,(float) 4.4,(float) 5.5};//声明两个数组vector ve1=new vector(v1);vector ve2=new vector(v2);//声明两个vector类对象try {System.out.println(ve1.dotProduct(ve2));} catch (Exception e1) {// TODO Auto-generated catch blocke1.printStackTrace();}try {ve1.add(ve2);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}System.out.println(ve1);}}publicclass Complex {float real;float imagin;//类的两个成员变量public Complex() {this.real=0;this.imagin=0;//构造函数}public Complex(float real, float imagin) {this.real = real;this.imagin = imagin;//重载的构造函数}privatestatic Complex add(Complex cp1, Complex cp2) {//add方法Complex cp = new Complex();//新建相加后的复数对象cp.real=cp1.real+cp2.real;cp.imagin=cp1.imagin+cp2.imagin;//做相加运算System.out.println(cp);//打印相加后的对象return cp;//返回相加后的复数对象}public String toString() {if(real == 0 &&imagin == 0)return"0";//当实部和虚部都为0是，输出0if(real == 0)return String.format("%10.4f", imagin)+"i";//实部为0，只需输出虚部if(imagin == 0)return String.format("%10.4f", real);//虚部为零，只需输出实部if(imagin> 0)return String.format("%10.4f", real) + "+" + String.format("%10.4f", imagin)+"i";//虚部>0用加return String.format("%10.4f", real) + "-" +String.format("%10.4f", -imagin)+"i";//虚部<0用减}publicstaticvoid main(String[] args) {Complex cp1= new Complex(1, 2);Complex cp2 = new Complex(3, -4);//实例化对象add(cp1,cp2);}}publicclass Student {long id;String name;int age;boolean sex;String phone;//声明成员变量public Student(long id, String name, int age, boolean sex, String phone) {super();this.id = id; = name;this.age = age;this.sex = sex;this.phone = phone;//构造函数}public String toString() {return"Student [name=" + name + ", phone=" + phone + "]";}publicstaticvoid main(String[] args) {Student at=new Student(411108, "hud", 20, true, "188293292");//实例化对象System.out.println(at);}}importjava.awt.BorderLayout;importjava.awt.Container;importjava.awt.FlowLayout;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;importjavax.swing.JButton;importjavax.swing.JFrame;importjavax.swing.JLabel;importjavax.swing.JPanel;importjavax.swing.JTextField;public class TestB2 extends JFrame {JTextField text1 = new JTextField(10);JTextField text2 = new JTextField(10);JTextField text3 = new JTextField(10);JTextField text4 = new JTextField(10);// 声明4个文本框public TestB2() {setSize(200, 200);setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setLocationRelativeTo(null);// 让窗口打开时在桌面中间JLabel label1 = new JLabel("请输入第一个数：");JLabel label2 = new JLabel("请输入第二个数：");JLabel label3 = new JLabel("请输入第三个数：");JLabel label4 = new JLabel("最小的一个数：");//新建4个标签JButton button = new JButton("执行");//新建按钮button.addActionListener(new ButtonAction());//为按钮添加事件响应Container container = getContentPane();//声明容器JPanel pane1 = new JPanel(new FlowLayout());JPanel pane2 = new JPanel(new FlowLayout());//声明两个流式面板pane1.add(label1);pane1.add(text1);pane1.add(label2);pane1.add(text2);pane1.add(label3);pane1.add(text3);pane2.add(button);pane2.add(label4);pane2.add(text4);//将组件加入各面板container.add(pane1, BorderLayout.CENTER);container.add(pane2, BorderLayout.SOUTH);//将面板加入容器中pack();}classButtonAction implements ActionListener {public void actionPerformed(ActionEvent e) {//事件响应函数double a = Double.parseDouble(text1.getText());double b = Double.parseDouble(text2.getText());double c = Double.parseDouble(text3.getText());//返回一个新的double 值，//该值被初始化为用指定String 表示的值，即把Text中的字符串转化为数组if (a < b){if (a < c)text4.setText(String.valueOf(a));}else if (b < c)text4.setText(String.valueOf(b));elsetext4.setText(String.valueOf(c));//比大小，String.valueOf(c)是把double 型的数转化为string}}public static void main(String[] args) {TestB2 tb = new TestB2();}}import java.awt.BorderLayout;import java.awt.Container;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextArea;import javax.swing.JTextField;publicclass TestB3extends JFrame {JTextField text1 = new JTextField(10);JTextField text2 = new JTextField(10);JTextArea text3 = new JTextArea(10, 10);// 声明三个组件，分别为两个文本框一个文本域public TestB3() {setSize(200, 200);setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setLocationRelativeTo(null);JLabel label1 = new JLabel("请输入一个大数：");JLabel label2 = new JLabel("请输入一个小数：");JButton button = new JButton("执行");// 组件的声明button.addActionListener(new ButtonAction());// 添加事件的监听Container container = getContentPane();// 声明容器JPanel pane1 = new JPanel(new FlowLayout());JPanel pane2 = new JPanel(new FlowLayout());// 声明两个面板pane1.add(label1);pane1.add(text1);pane1.add(label2);pane1.add(text2);pane2.add(button);pane2.add(text3);// 面板中加组件container.add(pane1, BorderLayout.CENTER);container.add(pane2, BorderLayout.SOUTH);// 把面板放入容器pack();}class ButtonAction implements ActionListener {publicvoid actionPerformed(ActionEvent e) {text3.setText("");// 先把结果栏清空int a = Integer.parseInt(text1.getText());int b = Integer.parseInt(text2.getText());// 讲输入的字符串转成整数int[] c = newint[a - b];int count = 0;for (int i = b; i <= a; i++) {boolean flag = true;for (int j = 2; j <= Math.sqrt(i); j++) {// 验证素数只要除到他的平方根if (i % j == 0) {flag = false;break;}}// 如果能整除，就不是素数if (flag && i != 1)// 除了1和其本身，不能整除c[count++] = i;// 用c数组记录是素数的数}for (int i = 0; i < count; i++) {if (i % 10 == 9)text3.setText(text3.getText() + "\n");// 每10个换行elsetext3.setText(text3.getText() + c[i] + ", ");// 不是10个用逗号隔开}}}publicstaticvoid main(String[] args) {TestB3 tb = new TestB3();}}importjava.awt.BorderLayout;importjava.awt.Container;importjava.awt.FlowLayout;importjava.awt.GridLayout;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;importjavax.swing.JButton;importjavax.swing.JFrame;importjavax.swing.JLabel;importjavax.swing.JPanel;importjavax.swing.JTextField;public class TestCaculator8 extends JFrame implements ActionListener {Container container = getContentPane(); //创建一个容器对象GridLayoutlayDigital = new GridLayout(3,4); //设置layDigital的布局为3行4列的网格JLabel j1=new JLabel("Connect Number"); // 新建一个标签JTextField result=new JTextField(10); //新建一个文本框JButton sure=new JButton("确定");//新建一个确定按钮JButton esc=new JButton("取消");//新建一个取消按钮JPanel J2=new JPanel(new FlowLayout());//新建名为j2的面板，它的布局是流式JPanel front=new JPanel(new FlowLayout());//新建名为front的面板，它的布局是流式JPanelpDigital = new JPanel(layDigital);//新建名为pDigital的面板，他的布局是3*4的网格JButton[] bDigtal = {new JButton("0"), new JButton("1"), new JButton("2"),newJButton("3"), new JButton("4"), new JButton("5"),newJButton("6"), new JButton("7"), new JButton("8"),new JButton("9"), new JButton("*"), new JButton("#") };//新建12个按钮public static void main(String[] args) {TestCaculator8 tc = new TestCaculator8();//实例化对象unchFrame();//调用tc的lanuchFrame方法}public void launchFrame() {setLocation(400, 400);setTitle("计算器");container.setLayout(new BorderLayout());//设置这个容器的布局管理器为边界分布管理器for (int i = 0; i <bDigtal.length; i++) {pDigital.add(bDigtal[i]);//把数字按钮添到面板中bDigtal[i].addActionListener(this);//为数字按钮添加动作监听器}sure.addActionListener(this);esc.addActionListener(this);front.add(j1);//在流式面板front中添加j1标签front.add(result);//在流式面板front中添加result文本框J2.add(sure);//在流式面板J2中添加确定按钮J2.add(esc);//在J2面板中添加取消按钮container.add(front,BorderLayout.NORTH);//在容器中添加front面板，为边界布局管理器，在屏幕的上方container.add(pDigital, BorderLayout.CENTER);//在容器中添加pDigital面板，为边界布局管理器，在屏幕的中间container.add(J2,BorderLayout.SOUTH);//在容器中添加J2面板，为边界布局管理器，在屏幕的下方pack();//使setVisible(true);}public void clear() {result.setText("");//设置result文本框的内容j1.setText("Connect Number");}public void actionPerformed(ActionEvent e) { //事件响应函数，当出发上面的事件监听时调用String s = e.getActionCommand(); //获取与当前命令相关的命令字符串String sResult = result.getText();//设置sResult为当前文本框的内容switch(s){case "0":case "1":case "2":case "3":case "4":case "5":case "6":case "7":case "8":case "9":case "*":case "#":result.setText(s+sResult);//当按下的是以上按钮时，将它加入文本框中break;case "确定":j1.setText("connecting");//设置标签文字break;case "取消":clear(); //实现clear方法break;}}}importjava.awt.Container;importjava.awt.GridLayout;importjava.awt.event.ActionEvent;importjava.awt.event.ActionListener;importjavax.swing.JButton;importjavax.swing.JComboBox;importjavax.swing.JFrame;importjavax.swing.JLabel;importjavax.swing.JTextField;public class TestComputer9 extends JFrame {Container container = getContentPane();//创建一个容器对象GridLayout G1 = new GridLayout(6, 1);//设置G1为6行1列的网格JLabel j1=new JLabel("计算无理数e的近似值");//新建标签JLabel j2=new JLabel("给出选项n:");//新建标签JLabel j3=new JLabel("近似值");//新建标签JButton b1=new JButton("执行");//新建按钮public JComboBoxjc = new JComboBox();//新建选择框JTextFieldjt=new JTextField(20);//新建文本框public static void main(String[] args) {TestComputer9 tc = new TestComputer9();unchFrame();}public void launchFrame() {int n=20;setLocation(400, 400);setTitle("计算器");for (int i = 1; i <=n; i++) {jc.addItem(i);}b1.addActionListener(new Myactionlistener());//为执行按钮添加事件的监听container.setLayout(G1);//在容器中设置布局管理器为G1的6*1container.add(j1);//添加j1组件container.add(j2);//添加j2组件container.add(jc); //添加jc组件container.add(j3);//添加j3组件container.add(jt);//添加jt组件container.add(b1);//添加b1组件jt.setEditable(false);//设置选择框不可编辑pack();setVisible(true);}classMyactionlistener implements ActionListener{public void actionPerformed(ActionEvent e) {int b=1;double a=1;String s = e.getActionCommand(); //获取与当前命令相关的命令字符串int n=(int)jc.getSelectedItem();//返回当前所选项for (int j = 1; j<=n ; j++) {b=b*j;a=a+1.0/b;}//利用展开式计算jt.setText(String.valueOf(a));}//设置文本框的内容为a的字符串形式}}。