Mercurial > jdk8-mips64-public > nashorn / file comparison
comparison: docs/JavaScriptingProgrammersGuide.html
docs/JavaScriptingProgrammersGuide.html
- changeset 377
- 26a345c26e62
- parent 279
- 1fd18f40ab52
- child 409
- 29b2b2ed954c
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| 376:51a5ee93d6bc | 377:26a345c26e62 |
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| 225 the same as a global variable with the name "file". The script can | 225 the same as a global variable with the name "file". The script can |
| 226 access the variable - for example, it can call public methods on | 226 access the variable - for example, it can call public methods on |
| 227 it. Note that the syntax to access Java objects, methods and fields | 227 it. Note that the syntax to access Java objects, methods and fields |
| 228 is dependent on the scripting language. JavaScript supports the | 228 is dependent on the scripting language. JavaScript supports the |
| 229 most "natural" Java-like syntax.</p> | 229 most "natural" Java-like syntax.</p> |
| 230 <p> | |
| 231 Nashorn script engine pre-defines two global variables named "context" | |
| 232 and "engine". The "context" variable is of type javax.script.ScriptContext | |
| 233 and refers to the current ScriptContext instance passed to script engine's | |
| 234 eval method. The "engine" variable is of type javax.script.ScriptEngine and | |
| 235 refers to the current nashorn script engine instance evaluating the script. | |
| 236 Both of these variables are non-writable, non-enumerable and non-configurable | |
| 237 - which implies script code can not write overwrite the value, for..loop iteration | |
| 238 on global object will not iterate these variables and these variables can not be | |
| 239 deleted by script. | |
| 230 <pre><code> | 240 <pre><code> |
| 231 // <a href="source/ScriptVars.java">ScriptVars.java</a> | 241 // <a href="source/ScriptVars.java">ScriptVars.java</a> |
| 232 | 242 |
| 233 import javax.script.*; | 243 import javax.script.*; |
| 234 import java.io.*; | 244 import java.io.*; |
