[投稿123] 用ProcessBuilder

[MSA011 (???)]

測試環境cygwin
java 1.7.0_25
javac 1.7.0

1. javac Output123.java

2. 在同一資料夾下建立

Rewrite.java

import java.io.File;

public class Rewrite {
    public static void main(String[] args){
        while (true){
            File file = new File("./tmp");
            if (file.exists()){
                file.delete();
                System.out.print("123");
                break;
            }
            try {
                Thread.sleep(10);
            } catch (InterruptedException e){}
        }
    }
}


RewriteStarter.java

import java.lang.ProcessBuilder.Redirect;

public class RewriteStarter {
    public static void main(String[] args){
        try{
            ProcessBuilder pb = new ProcessBuilder("java","Rewrite");
            pb.redirectOutput(Redirect.INHERIT);
            pb.start();
        }catch(Exception e){}
    }
}

3. javac Rewrite.java RewriteStarter.java

4. java RewriteStarter

5. java Output123 > tmp

想不到標題

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