Imports não funcionam Eclipe Kleper, Jdk 7

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;


public class leArqTerminais {
		
	public void leArq (String args []) throws IOException{
		
		InputStream is = new FileInputStream("TC.txt"); 
		InputStreamReader isr = new InputStreamReader(is); 	
		BufferedReader br = new BufferedReader (isr);
		
		// Usa o readLine() do Bufferedreader para ler cada linha
		String tc = br.readLine();
		
		//Ele vai sozinho para a próxima, quando acaba retorna null
			while (tc != null){
			System.out.println(tc);
			tc =  br.readLine();

			}
			br.close();
	}
}