学生信息管理系统

				/*
				 * Student.java
				 *
				 * Created on 2008年4月2日, 下午9:16
				 *
				 * To change this template, choose Tools | Template Manager
				 * and open the template in the editor.
				 */
				
				package finaltest;
				
				/**
				 *
				 * @author Administrator
				 */
				public class Student {
				    private String id;
				    private String name;
				    private String sex;
				    private int age;
				    private String major;
				    private String myclass;
				    /** Creates a new instance of Student */
				    void setId(String id){
				        this.id = id;
				    }
				    String getId(){return id;}
				    
				    void setName(String name){this.name =name;}
				    String getName(){return this.name;}
				    
				    void setSex(String sex){this.sex =sex;}
				    String getSex(){return this.sex;}
				    
				    void setAge(int age){this.age =age;}
				    int getAge(){return this.age;}
				    
				    void setMajor(String major){this.major =major;}
				    String getMajor(){return this.major;}
				    
				    void setMyclass(String myclass){this.myclass =myclass;}
				    String getMyclass(){return this.myclass;}
				    
				    static boolean isLegalId(String str){  //判断是否位合法id或年龄
				        int len=str.length();
				        if(len>9){                                 //int型最大只有十位。
				            System.out.println("数字太长，请重新输入");
				            return false; 
				        }
				        for(int i=0;i				                char ch=str.charAt(i);            //取出第i个字符检测
				                if(ch'9'){
				                    System.out.println("必须是整数！请重新输入.");
				                    return false;
				                } 
				        }
				        return true;
				    }
				    /** Creates a new instance of Student */
				    public Student() {
				    }
				    
				}