javac Foo.java && java Foo in windows vscode terminal not work

Question

I'd like to command javac & java at the same time but it's not work and it return below exception :

At line:1 char:17
+ javac Demo.java && java Demo
+                 ~~
The token '&&' is not a valid statement separator in this version.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : InvalidEndOfLine

if i run separately it's work

PS D:\git\ITWeiHanDEV\Java> javac Demo.java

PS D:\git\ITWeiHanDEV\Java> java Demo

ps :

my version is java8
it's windows 10 visual studio code terminal

What shell and terminal are you using? – John Aug 07 '20 at 01:10 — John, Aug 07 '20 at 01:10
@John windows 10 visual studio code terminal – Wei Lin Aug 07 '20 at 01:11 — Wei Lin, Aug 07 '20 at 01:11

score 2 · Answer 1 · answered Aug 07 '20 at 01:52

2

I tried to change vscode terminal type to cmd not powershell integrated console and run below script and it's work

cd "d:\git\ITWeiHanDEV\Java\" && javac Demo.java && java Demo

answered Aug 07 '20 at 01:52

Wei Lin

3,591
2
20
52

2

Yes, `cmd.exe`, the Windows legacy shell, has always supported `&&` and `||`, whereas PowerShell started supporting these operators only from v7.0 – mklement0 Aug 07 '20 at 02:11

mklement0 · Accepted Answer · 2020-08-07T01:54:02.047

2

PowerShell versions 6.x and earlier, including Windows PowerShell, do not support && and ||, the pipeline chain operators - they're only available in PowerShell [Core] 7+

In 6.x and earlier, you can emulate the behavior of && as follows:

javac Demo.java; if ($LASTEXITCODE -eq 0) { java Demo }

edited Aug 07 '20 at 01:54

answered Aug 07 '20 at 01:52

mklement0

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javac Foo.java && java Foo in windows vscode terminal not work

2 Answers2