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import
java.util.Scanner;
import
java.io.*;
public
class
FileScannerTest{
public
static
void
main(String args[]){
//**************Scanner 的一般用
//1.public Scanner(InputStream source),利用InputStream 对象进行构造
Scanner myScanner1 =
new
Scanner(System.in);
while
(myScanner1.hasNextInt()){
int
i=myScanner1.nextInt();
System.out.println(i);
}
//2.public Scanner(File source) throws FileNotFoundException , 利用File对象进行构造
try
{
Scanner myScanner2 =
new
Scanner(
new
File(
"in.txt"
));
while
(myScanner2.hasNextInt()){
int
i=myScanner2.nextInt();
System.out.println(i);
}
}
catch
(FileNotFoundException e){
System.out.println(
"该文件不存在！"
);
}
//3.public Scanner(String str)， 利用一个String对象进行构造
Scanner myScanner3 =
new
Scanner(
new
String(
"1 2 3 4 a f f 4 56"
));
//遇到非整数的地方hasNextInt(）返回false
while
(myScanner3.hasNextInt()){
int
i=myScanner3.nextInt();
System.out.println(i);
}
}
}
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本文转自 小眼儿 博客园博客，原文链接：http://www.cnblogs.com/hujunzheng/p/3817769.html，如需转载请自行联系原作者
