你的程序我不知道是怎么回事,但要实现dir的系统命令,下面的小程序就行
import java.io.*;public class DirList {
public static void main(String[] args) {
try {
File path = new File(".");
String[] list;
if(args.length == 0)
list = path.list();
else
list = path.list(new DirFilter(args[0]));
for(int i = 0; i < list.length; i++)
System.out.println(list[i]);
} catch(Exception e) {
e.printStackTrace();
}
}
}class DirFilter implements FilenameFilter {
String afn;
DirFilter(String afn) { this.afn = afn; }
public boolean accept(File dir, String name) {
// Strip path information:
String f = new File(name).getName();
return f.indexOf(afn) != -1;
}
} ///:~
import java.io.*;public class DirList {
public static void main(String[] args) {
try {
File path = new File(".");
String[] list;
if(args.length == 0)
list = path.list();
else
list = path.list(new DirFilter(args[0]));
for(int i = 0; i < list.length; i++)
System.out.println(list[i]);
} catch(Exception e) {
e.printStackTrace();
}
}
}class DirFilter implements FilenameFilter {
String afn;
DirFilter(String afn) { this.afn = afn; }
public boolean accept(File dir, String name) {
// Strip path information:
String f = new File(name).getName();
return f.indexOf(afn) != -1;
}
} ///:~
1、要执行DOS下的dir命令,需要使用:runtimeInstance.exec("cmd /c dir")。2、不能直接println(""+runtimeInstance.exec("dir")),这样的话runtimeInstance.exec("dir")直接就转换为字符串了!。从命令行执行指定程序:import java.lang.*;
public class TestExec{
public static void main(String args[])
{
try{
Process pro = Runtime.getRuntime().exec("cmd /c a.bat");
}
catch(Exception ex){
System.out.println("error");
}
}
}