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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Myexception {
public static void main(String[] args) {
try {
System.out.println("请输入数字:");
while(true) {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String oneLine = in.readLine();
int i = -1;
if(oneLine.trim().length()>0)
i = Integer.parseInt(oneLine);
if(i <0) {
System.out .println("您所输入的数字不能小于零");
}else{
System.out.println("您输入的数字大于零。谢谢,GoodBye!");
break;
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
int i=System.in.read();
Scanner scanner = new Scanner(System.in) ;
int i = scanner.nextInt();