听课练习（八）
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test类定义：
package com.jereh5;public class Test_8_12 { // 1// private String name;// private int age , height;// // public int getAge(){// return age;// }// public void setAge(int age){// this.age = age;// }// public int getHeight(){// return height;// }// public void setHeight(int height){// this.height = height;// }// public String getName(){// return name;// }// public void setName(String name){// this.name = name;// } // 2// private String vipNum;// private String integral;// // public void setVipNum(String vipNum){// this.vipNum = vipNum;// }// // public String getVipNum(){// return vipNum;// }// // public void setIntegral(String integral){// this.integral = integral;// }// // public String getIntegral(){// return integral;// } // 3// private String bookId;// private String bookName;// private String bookActor;// private String bookDate;// private double bookPrice;// private int bookNum;// public String getBookId() {// return bookId;// }// public void setBookId(String bookId) {// this.bookId = bookId;// }// public String getBookName() {// return bookName;// }// public void setBookName(String bookName) {// this.bookName = bookName;// }// public String getBookActor() {// return bookActor;// }// public void setBookActor(String bookActor) {// this.bookActor = bookActor;// }// public String getBookDate() {// return bookDate;// }// public void setBookDate(String bookDate) {// this.bookDate = bookDate;// }// public double getBookPrice() {// return bookPrice;// }// public void setBookPrice(double bookPrice) {// this.bookPrice = bookPrice;// }// public int getBookNum() {// return bookNum;// }// public void setBookNum(int bookNum) {// this.bookNum = bookNum;// } // 4} // 1//class StedentManager{// // public void getSum(Test_8_12[] test){// // System.out.println("身高总和为："+(test[0].getHeight()+test[1].getHeight()+test[2].getHeight()+test[3].getHeight()+test[4].getHeight()));// // }// public void getAvg(Test_8_12[] test){// // System.out.println("身高平均为："+(test[0].getHeight()+test[1].getHeight()+test[2].getHeight()+test[3].getHeight()+test[4].getHeight())/5);//// }//} // 2//class MemberBiz{// // public void show(Test_8_12[] test){// // for(int i = 0; i < test.length; i++){// System.out.println("编号："+test[i].getVipNum()+"\t积分:"+test[i].getIntegral());// }// // }// //} // 3//class BookBiz{// // Test_8_12[] t = new Test_8_12[5];// public void addBook(Test_8_12 test){// // for(int i = 0; i < t.length; i++){// t[i] = test;// if(i==5)// break;// }// // System.out.println("添加成功"); // // }// // public Test_8_12 searchBook(String bookId){// // int k = -1;// for(int i = 0; i < t.length; i++){// if(bookId.equals(t[i].getBookId())){// k = i;// break;// }// } // if(k!=-1){// return t[k];// }else{// return null;// }// }// //} // 4Demo类演示：
package com.jereh5;import java.util.Scanner;public class Demo_8_12 { public static void main(String[] args){ Scanner scn = new Scanner(System.in); // 1// Test_8_12[] test = new Test_8_12[5];// Test_8_12 t = new Test_8_12();// for(int i = 0; i < test.length; i++){// Test_8_12 ti = new Test_8_12();// System.out.println("请输入第"+(i+1)+"位姓名：");// String name = scn.next();// ti.setName(name);// System.out.println("请输入第"+(i+1)+"位年龄：");// int age = scn.nextInt();// ti.setAge(age);// System.out.println("请输入第"+(i+1)+"位身高：");// int height = scn.nextInt();// ti.setHeight(height);// test[i] = ti;// }// // StedentManager sm = new StedentManager();// sm.getSum(test);// sm.getAvg(test); // 2// // Test_8_12[] test = new Test_8_12[5];// // for(int i = 0; i < test.length; i++){// Test_8_12 t = new Test_8_12();// System.out.println("请输入第"+(i+1)+"位编号：");// String vipNum = scn.next();// t.setVipNum(vipNum);// System.out.println("请输入第"+(i+1)+"位积分：");// String integral = scn.next();// t.setIntegral(integral);// test[i] = t;// }// // MemberBiz mb = new MemberBiz();// mb.show(test); // 3// Test_8_12 test = null;// for(int i = 0; i < 5 ; i++){// test = new Test_8_12();// // System.out.println("=========请输入图书信息==========");// System.out.println("请输入图书编号:");// String bookId = scn.next();// test.setBookId(bookId);// System.out.println("请输入图书书名:");// String bookName = scn.next();// test.setBookName(bookName);// System.out.println("请输入图书作者:");// String bookActor = scn.next();// test.setBookActor(bookActor);// System.out.println("请输入图书日期:");// String bookDate = scn.next();// test.setBookDate(bookDate);// System.out.println("请输入图书价格:");// double bookPrice = scn.nextDouble();// test.setBookPrice(bookPrice);// System.out.println("请输入图书数量:");// int bookNum = scn.nextInt();// test.setBookNum(bookNum);// }// // BookBiz bb = new BookBiz();// bb.addBook(test);//// System.out.println("请输入您要查找的图书编号：");// String numId = scn.next();// Test_8_12 tt = bb.searchBook(numId);// if(tt!=null)// System.out.println("图书为："+tt.getBookId()+"\t"+tt.getBookName()+"\t"+tt.getBookActor()+"\t"+tt.getBookDate()+"\t"+tt.getBookPrice()+"\t"+tt.getBookNum());// else// System.out.println("该书不存在！"); // 4// System.out.println("******欢迎进入注册系统*******");// System.out.println("请输入用户名：");// String name = scn.next();// System.out.println("请输入密码：");// String pwd = scn.next();// char[] c = pwd.toCharArray();// System.out.println("请再次输入密码：");// String repwd= scn.next();// //// String regex = "\\d\\w";// boolean bool =false;// // for(int i = 0; i < c.length; i++){// // if(c[i]>='0'&&c[i]<='9'||c[i]>='a'&&c[i]<='z'||c[i]>='A'&&c[i]<='Z'){// c[i] = c[i];// bool = true;// }else{// c[i] = ' ';// //System.out.println("含有非法字符");// bool = false;// break;// }// }// if(bool){// if(pwd.equals(repwd)){// System.out.println("注册成功！");// }else{// System.out.println("注册失败！");// }// }else{// System.out.println("含有非法字符，注册失败");// } // 6// System.out.println("请输入文件名：");// String str ="长亭外 古道边 芳草碧连天 晚风拂柳 笛声残 夕阳山外山"; //str.trim(); //System.out.println();// String[] s = str.split(" ");// System.out.println(str.trim());// for(int i = 0 ; i<s.length;i++)// System.out.println(s[i]);// if(s.length<=2){// if(s[1].equals("java"))// System.out.println("格式正确!");// else// System.out.println("格式错误!");// }else{// System.out.println("格式错误!");// }// // 7 // System.out.println("输入手机号：");// String str = scn.next();// String s = str.substring(0, (str.length()-1));// // String regex = "[0-9]+";// String ri = "\\d+";// // if(s.matches(ri))// System.out.println("全数字");// else// System.out.println("不是全数字");// }}以下为自学练习：
package com.jereh4;import java.io.*;public class Demo_8_11 { public static void main(String[] args) throws Exception{// File file = new File("dir");// file.createNewFile();// System.out.println(file.mkdir());// File file = new File(File.separator);// // String str = "feng"+File.separator+"FirstProject"+File.separator+"A.java";// // File fl = new File(file,str);// fl.createNewFile();// fl.delete();// for(int i = 0; i < 5; i++){// File file = File.createTempFile("winTemp", ".tmp"); //file.deleteOnExit();// }// File file = new File(File.separator);// // String str = "feng"+File.separator+"FirstProject";// // File fl = new File(file,str);// String[] names = fl.list();// for(int i = 0; i < names.length; i++)// System.out.println(names[i]);// InputStream i = new Inputstream();// FileInputStream is = new FileInputStream("Book.txt");//// InputStreamReader ir = new InputStreamReader(is,"UTF-8");// // BufferedReader br = new BufferedReader(ir);// // System.out.println(br.readLine());// File file = new File("bingWrite.txt");// // if(!file.exists()){// file.createNewFile();// System.out.println("文件创建成功！");// }else{// System.out.println("文件已存在，无法创建！");// }// byte[] b = {'a','b','c'};// FileOutputStream os = new FileOutputStream(file,true); // // OutputStreamWriter ow = new OutputStreamWriter(os,"GB2312");// // BufferedWriter bw = new BufferedWriter(ow);// // String str = "测试成功！";// ow.write(str);// // ow.flush();// ow.close();// bw.write(str);// // bw.flush();// bw.close(); // 对字节的操作// DataOutputStream dis = new DataOutputStream(new BufferedOutputStream(new FileOutputStream("bingWrite.txt")));// // dis.writeChars("who");// // dis.close();// // FileInputStream fis = new FileInputStream("bingWrite.txt");// // int len = fis.available();// // byte[] b = new byte[len];// // int carch = fis.read(b);// // String str = new String(b);// // System.out.println(str); // 对字符的操作// FileOutputStream fos = new FileOutputStream("bingWrite.txt",true);// OutputStreamWriter osw = new OutputStreamWriter(fos,"UTF-8");// BufferedWriter bw = new BufferedWriter(osw);// // String str = "\t天气真好";// String s = "\t适合外出";// // bw.write(str);// bw.newLine();// bw.write(s);// bw.close();// FileInputStream fis = new FileInputStream("bingWrite.txt");// InputStreamReader isr = new InputStreamReader(fis,"UTF-8");// BufferedReader br = new BufferedReader(isr);// StringBuffer sb = new StringBuffer();// String temp = "";// // for(int i = 1; (temp=br.readLine())!=null&&!temp.equals("外出");i++){// sb = sb.append(temp);// sb = sb.append(System.out.getProperty()// }// // // String line = "";// while((line = br.readLine())!=null){// System.out.println(line);// } //System.out.println(br.readLine()); }} 0 0
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