java1-徐少伟1407094216

[MeerkatX]

//作业一删除羊：
ArrayList sheeplist=new ArrayList();
sheeplist.add(new sheep("aa"));
sheeplist.add(new sheep("bb"));
sheeplist.add(new sheep("cc"));
sheeplist.add(new sheep("dd"));
sheeplist.add(new sheep("ee"));
//方法一：
for (int i = 0; i <=sheeplist.size();i++) {
sheeplist.remove(0);
}
//方法二：
for(int i=5;i>2;i--)
sheeplist.remove(sheeplist.get(i));

//循环：
for (int j = 0; j < sheeplist.size(); j++) {
System.out.println(((sheep)sheeplist.get(j)).getName());
}
//作业2：
public class main {
public static void main(String[] args) throws IOException{
File file=new File("D:\helloworld.txt");
File filebox=new File("d:\test");
if(!filebox.exists())
filebox.mkdir();
for (int j = 0; j < 10; j++) {
file=new File(filebox,"helloworld"+j+".txt");
try {
if(!file.exists())
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String s="zzzz"+j;
OutputStream out=new FileOutputStream(file);
out.write(s.getBytes());
}
InputStream in=new FileInputStream(file);
byte[] b=new byte[5];
in.read(b);
String s2=new String(b);
System.out.println(s2);
//作业3：
class ExThread extends Thread{
public ExThread(String name){
super(name);
}
public ExThread(){
super();
}
public void run() {
for(int i=0;i<5;i++){
System.out.println("ExThread"+this.getName()+i);
}
}

}

class Threadi implements Runnable{

public String name;

public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

public void run() {
for(int i=0;i<5;i++){
System.out.println("runable"+this.getName()+i);
}
}
}