# io.github.libtmux.scaladsl.query.Expr.asJava

- **Module:** io.github.libtmux.scaladsl.query
- **Package:** io.github.libtmux:libtmux-scala_3
- **Language:** Scala
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-java/blob/f56392b5d9bc7f1f9c1631842333fb90f3d82d40/libtmux-scala/src/main/scala/io/github/libtmux/scaladsl/query/Expr.scala#L30
- **Page:** https://libtmux.org/en/scala/latest/reference/io-github-libtmux-scaladsl-query-expr-asjava/

```
extension [T](e: Expr[T])
def asJava: JavaFilterExpr[T]
```

The underlying Java expression. Opaque wrapping is free, so this never copies anything.