Rating:
# VirtualJava
## Description
There's nothing like executing my own code in Java in my own special way.
[VirtualJava.java](VirtualJava.java)
## Solution
The [class](VirtualJava.java) operates like some kind of assembly code.
It parses through the input characters and obtain an output. If the output in each step falls to owo[1], it would be wrong.
It's too tedious to reverse it artificially, so I reversed it using the given [code](VirtualJavaSolve.java) with some modification.
Each step I at a printable character to the string and check the outcome. If the output was good, add it to the answer and move on to next word.
```
for (int i = 32; i < 127; ++i){
String aa = Character.toString((char)i);
String a = ans + aa;
...
boolean right=true;
for (int j = 0; j < c.length; j++) {
String s = getOutput(Math.abs(java.run(j, (int) c[j])));
if (s.equals(owo[1])) {
right = false;
break;
}
}
if (right == true){
System.out.println("yes");
ans = ans + aa;
}
```
Finally, it split out the answer automatically.
```
hsctf{y0u_d3f34t3d_th3_b4by_vm}
```
