错误代码java

package java3;

import java.io.*;



class  Thread1 extends Thread{
	private String ID;
	public static final String dizhi= "D:\\male.txt";	
	public Thread1(String ID) {
		this.ID=ID;
	}
	
	
		public void run() {
			String str=ID;
			String sex=str.substring(8,10);
			String ymd=str.substring(0,8);
		    int ymdi=Integer.parseInt(ymd);

		    
		    while(ymdi<20190901&&sex.equals("00")) {
		        System.out.println(toString());
				File file=new File(dizhi);
				FileOutputStream fos;
				byte[] b= new byte[1000];
				try {
					b=toString().getBytes();
					fos = new FileOutputStream(file);
					fos.write(b);
					fos.close(); 
				} catch (Exception e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			
			    
				System.out.println("操作成功");
		
		}
	}
}	
class  Thread2 extends Thread{
			private String ID;
			public static final String dizhi1= "D:\\female.txt";	
			public Thread2(String ID) {
				this.ID=ID;
			}
			
			
				public void run() {
					String str=ID;
					String sex=str.substring(8,10);

				    while(sex.equals("00")) {
					   
						File file1 =new File(dizhi1);
						FileOutputStream fos;
						byte[] b= new byte[1000];
						try {
							b=toString().getBytes();
							fos = new FileOutputStream(file1);
							fos.write(b);
							fos.close(); 
						} catch (Exception e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
						
					    System.out.println(toString());

						System.out.println("操作成功");
				
				}
			}
}
				
public  class Employee {

	public String name;
	public String ID;
	public int age;
	public String salary;


	public Employee(String name,String ID,int age,String salary){
		
		this.name=name ;
		this.ID=ID;
		this.age=age;
		this.salary=salary;
		
	}
	
	public  String getID() {
		return ID;
	}
	
	public void setID(String ID) {
		this.ID=ID;
	}
	
	public  String getName() {
		return name;
	}
	
	public void setName(String name) {
		this.name=name;
	}
	
	public int getAge() {
		return age;
	}
	
	public void setAge(int age) {
		this.age=age;
	}
	
	public  String getSalary() {
		return salary;
	}
	
	public void setSalary(String salary) {
		this.salary=salary;
	}
	
	public  String toString () {
		String mess = " 姓名:" +getName()+" 年龄:"+getAge()+ " ID:"+getID()+ "薪水:"+getSalary() ;
		 return mess;
	}
	


	
	
	public static void main(String []args){
	
		 //ArrayList<Employee> arraylist=new ArrayList<Employee>();
		 Employee em[]=new Employee[10];
		 em[1] =new Employee("zengtao","2017010100222",22,"5800");
		 em[2] =new Employee("zengtao1","2017010100223",22,"5800");
		 em[3] =new Employee("zengtao2","2019010100232",22,"5800"); 
		 em[4] =new Employee("zengtao3","2019010101256",22,"5800");
		 em[5] =new Employee("zengtao4","2019010101256",22,"5800");
		 em[6] =new Employee("zengtao5","2019010100256",22,"5800");
		 em[7] =new Employee("zengtao6","2020010100289",22,"5800");
		 em[8] =new Employee("zengtao7","2019010200200",22,"5800");
		 em[9] =new Employee("zengtao8","2011010100212",22,"5800");
	     em[0] =new Employee("zengtao9","1999010100222",22,"5800");
	     System.out.println("hello world");

	    Thread1  th1;
	    th1 = new Thread1(em[1].getID());
		for(int i=0;i<10;i++) {
			th1 = new Thread1(em[i].getID()); 
			th1.start();
			//th1.run(); 
		}
		
       Thread2  th2;
		for(int i=0;i<10;i++) {
			th2 = new Thread2(em[i].getID());
			th2.start();
		//	th2.run(); 
		}
System.out.println("hell o");

	}

}