求助！麻烦各位大虾帮我解决一下这几道JAVA题，谢啦！急~~~

1
(1) FileInputStream
(2) char buf;
(3) (char) fis1.read()
(4) while ((buf = (char) fis2.read()) > 0) System.out.print((char) buf);
fis1.close();
(5)catch (FileNotFoundException e)

你题目抄的有点问题 附上可执行源码
public class SequenceInputStreamDemo {

public static void main(String[] args) {

// _______(1)___________fis1,fis2;
FileInputStream fis1, fis2;

try {
fis1 = new FileInputStream("prog1.java");
fis2 = new FileInputStream("prog2.java");

// _________(2)___________;
char buf;

// while((buf=________(3)_________)>0) System.out.print((char)buf);
while ((buf = (char) fis1.read()) > 0) System.out.print((char) buf);

// ________(4)_______;
while ((buf = (char) fis2.read()) > 0) System.out.print((char) buf);
fis1.close();

fis2.close();

// }________(5)_________{
} catch (FileNotFoundException e) {

System.out.println(e);

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

2
(1) 什么也不填
(2) super();
(3) 什么也不填
(4) .indexOf(" ");
(5)i > 0

可执行代码：
public class Name {

private String useName;

private String useS;

// public _______(1)Name{
public Name() {
// _______(2) useName =”whatever”; useS=”whatever”;}
super();

useName = "whatever";
useS = "whatever";
}

// public _______(3)Name (String s)
public Name(String s) {
// {int i=s. _______(4)___________;//搜索空格
int i = s.indexOf(" ");

// if(_______(5)___________){
if (i > 0) {
useName = s.substring(0, i);
useS = s.substring(i + 1);
}
}
}

一
1 FileInputStream
2 char buf;
3 fis2.read();
4 fis1.close();

1、FileInprtStream
2、char buf
3、fis1.next||fis2.next
4、fis1.close()

catch(Exception e)

1、void
2、
3、void
4、split(" ")
5、i!=-1

public class Name{
private String useName;
private String useS;
public _______(1)Name{
_______(2) useName =”whatever”; useS=”whatever”;}
public _______(3)Name (String s)
{int i=s. _______(4)___________;//搜索空格
if(_______(5)___________){
useName=s.substring(0,i);
useS=s.substring(i+1);}}}