package jp.yucchi.jshellapiexample;\r\n\r\nimport java.util.List;\r\nimport java.util.Locale;\r\nimport jdk.jshell.ErroneousSnippet;\r\nimport jdk.jshell.ExpressionSnippet;\r\nimport jdk.jshell.JShell;\r\nimport jdk.jshell.MethodSnippet;\r\nimport jdk.jshell.Snippet;\r\nimport jdk.jshell.Snippet.Status;\r\nimport jdk.jshell.SnippetEvent;\r\nimport jdk.jshell.TypeDeclSnippet;\r\nimport jdk.jshell.VarSnippet;\r\n\r\npublic class JShellAPIExample {\r\n\r\n private final JShell shell;\r\n\r\n public JShellAPIExample() {\r\n\tshell = JShell.create();\r\n\/\/ shell = JShell.builder()\r\n\/\/ .compilerOptions(\"-source\", \"1.7\", \"-target\", \"1.7\",\r\n\/\/ \"-bootclasspath\", \"\/home\/yucchi\/Sun\/jdk1.7.0_80\/jre\/lib\/rt.jar\",\r\n\/\/ \"-extdirs\", \"\")\r\n\/\/ .remoteVMOptions(\"-XX:AutoBoxCacheMax=128\")\r\n\/\/ .in(System.in)\r\n\/\/ .err(System.err)\r\n\/\/ .out(System.out)\r\n\/\/ .build();\r\n }\r\n\r\n public void close() {\r\n if (shell != null) {\r\n shell.close();\r\n }\r\n }\r\n\r\n public void eval(String snippetSource) {\r\n\r\n System.out.println(snippetSource);\r\n\r\n List<SnippetEvent> se = shell.eval(snippetSource);\r\n\r\n se.forEach(e -> {\r\n if (e.causeSnippet() == null) {\r\n Snippet snippet = e.snippet();\r\n switch (snippet.kind()) {\r\n case IMPORT:\r\n switch (snippet.subKind()) {\r\n case SINGLE_TYPE_IMPORT_SUBKIND:\r\n System.out.println(\"<< Single-Type-Import Declaration. >>\");\r\n break;\r\n case SINGLE_STATIC_IMPORT_SUBKIND:\r\n System.out.println(\"<< Single-Static-Import Declaration. >>\");\r\n break;\r\n case TYPE_IMPORT_ON_DEMAND_SUBKIND:\r\n System.out.println(\"<< Type-Import-on-Demand Declaration. >>\");\r\n break;\r\n case STATIC_IMPORT_ON_DEMAND_SUBKIND:\r\n System.out.println(\"<< Static-Import-on-Demand Declaration. >>\");\r\n break;\r\n default:\r\n break;\r\n }\r\n break;\r\n\r\n case ERRONEOUS:\r\n System.out.println(\"ERROR! \" + ((ErroneousSnippet) snippet).probableKind() + \":\");\r\n break;\r\n case TYPE_DECL:\r\n TypeDeclSnippet type = (TypeDeclSnippet) snippet;\r\n System.out.print(\"<< Created \");\r\n\r\n switch (snippet.subKind()) {\r\n case CLASS_SUBKIND:\r\n System.out.print(\"Class: \");\r\n break;\r\n case INTERFACE_SUBKIND:\r\n System.out.print(\"Interface: \");\r\n break;\r\n case ENUM_SUBKIND:\r\n System.out.print(\"Enum: \");\r\n break;\r\n case ANNOTATION_TYPE_SUBKIND:\r\n System.out.print(\"Annotation: \");\r\n break;\r\n default:\r\n break;\r\n }\r\n System.out.println(type.name() + \" >>\");\r\n break;\r\n case METHOD:\r\n MethodSnippet method = (MethodSnippet) snippet;\r\n System.out.println(\"<< Created Method: \"\r\n + method.name() + \"(\"\r\n + method.parameterTypes() + \")\" + \" >>\");\r\n break;\r\n case VAR:\r\n switch (snippet.subKind()) {\r\n case VAR_DECLARATION_SUBKIND:\r\n System.out.println(\"<< A variable declaration without initializer. >>\");\r\n System.out.println(((VarSnippet) snippet).name() + \" ==> \" + e.value());\r\n break;\r\n case TEMP_VAR_EXPRESSION_SUBKIND:\r\n System.out.println(\"<< An expression whose value has been stored in a temporary variable. >>\");\r\n System.out.println(((VarSnippet) snippet).name() + \" ==> \" + e.value());\r\n break;\r\n case VAR_DECLARATION_WITH_INITIALIZER_SUBKIND:\r\n System.out.println(\"<< A variable declaration with an initializer expression. >>\");\r\n System.out.println(((VarSnippet) snippet).name() + \" ==> \" + e.value());\r\n break;\r\n default:\r\n break;\r\n }\r\n break;\r\n case EXPRESSION:\r\n switch (snippet.subKind()) {\r\n case VAR_VALUE_SUBKIND:\r\n System.out.println(\"<< A simple variable reference expression. >>\");\r\n System.out.println(((ExpressionSnippet) snippet).name() + \" ==> \" + e.value());\r\n break;\r\n case ASSIGNMENT_SUBKIND:\r\n System.out.println(\"<< An assignment expression. >>\");\r\n System.out.println(((ExpressionSnippet) snippet).name() + \" ==> \" + e.value());\r\n break;\r\n default:\r\n break;\r\n }\r\n break;\r\n case STATEMENT:\r\n System.out.println(\"<< \" + \"Statement: \" + e.snippet() + \" >>\");\r\n break;\r\n default:\r\n System.out.println(\"<< \" + e.getClass().getCanonicalName() + \" >>\");\r\n break;\r\n }\r\n\r\n if (e.status() != Status.VALID) {\r\n this.shell.diagnostics(e.snippet()).forEach(i -> {\r\n System.out.println(\"[ \" + i.getMessage(Locale.getDefault()) + \" ]\");\r\n });\r\n }\r\n\r\n }\r\n });\r\n\r\n }\r\n\r\n public static void main(String[] args) throws Exception {\r\n\r\n JShellAPIExample example = new JShellAPIExample();\r\n\r\n example.eval(\"import java.time.LocalTime;\");\r\n example.eval(\"@FunctionalInterface \\n\"\r\n + \"interface Greeting<T, R> {\\n\"\r\n + \"R apply(T time, R message);\\n\"\r\n + \"\\n\"\r\n + \" default void sayGreeting(String greeting) {\\n\"\r\n + \" greeting(greeting);\\n\"\r\n + \" }\\n\"\r\n + \"\\n\"\r\n + \" private void greeting(String greeting) {\\n\"\r\n + \" System.out.println(greeting + \\\" from JShellAPI.\\\");\\n\"\r\n + \" };\\n\"\r\n + \"}\");\r\n example.eval(\"LocalTime now = LocalTime.now();\");\r\n example.eval(\"int hour = now.getHour();\");\r\n example.eval(\"Greeting<Integer, String> greeting\\n\"\r\n + \" = (time, message) -> 4 <= time && time < 11 ? \\\"Good morning!\\\"\\n\"\r\n + \" : 11 <= time && time < 18 ? \\\"Good afternoon!\\\"\\n\"\r\n + \" : \\\"Good evening!\\\";\");\r\n example.eval(\"String message = null;\");\r\n example.eval(\"greeting.sayGreeting(greeting.apply(hour, message));\");\r\n example.eval(\"\");\r\n System.out.println(\"(\u25cb\uff65\u03c9\uff65)\uff89----------------------------------------------------------)\\n\");\r\n\r\n example.eval(\"Integer x = 128;\");\r\n example.eval(\"Integer y = 128;\");\r\n example.eval(\"void equivalenceTest(Integer x, Integer y) { System.out.println(x == y); }\");\r\n example.eval(\"equivalenceTest(x, y);\");\r\n System.out.println(\"(\u25cb\uff65\u03c9\uff65)\uff89----------------------------------------------------------)\\n\");\r\n\r\n example.eval(\"import java.util.Arrays;\"); \/\/ \u7701\u7565\u4e0d\u53ef\r\n example.eval(\"String str;\");\r\n example.eval(\"str = \\\"Java\\\";\");\r\n example.eval(\"String[] elems = str.split(\\\"\\\");\");\r\n example.eval(\"System.out.println(Arrays.toString(elems));\");\r\n example.eval(\"Arrays.stream(elems).forEach(System.out::println);\");\r\n System.out.println(\"(\u25cb\uff65\u03c9\uff65)\uff89----------------------------------------------------------)\\n\");\r\n\r\n example.eval(\"public enum JavaPlusYou {\\n\"\r\n + \"\\n\"\r\n + \" Japanese(\\\"\u3042\u306a\u305f\u3068JAVA,\u4eca\u3059\u3050\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\\\"),\\n\"\r\n + \" English(\\\"JAVA+YOU, DOWNLOAD TODAY!\\\");\\n\"\r\n + \"\\n\"\r\n + \" private final String downloadNow;\\n\"\r\n + \"\\n\"\r\n + \" private JavaPlusYou(final String downloadNow) {\\n\"\r\n + \" this.downloadNow = downloadNow;\\n\"\r\n + \" }\\n\"\r\n + \"\\n\"\r\n + \" public String getDownloadNow() {\\n\"\r\n + \" return downloadNow;\\n\"\r\n + \" }\\n\"\r\n + \"\\n\"\r\n + \"}\");\r\n example.eval(\"for (JavaPlusYou jpy : JavaPlusYou.values()) {\\n\"\r\n + \" System.out.println(jpy + \\\": \\\" + jpy.getDownloadNow());\\n\"\r\n + \" }\");\r\n System.out.println(\"(\u25cb\uff65\u03c9\uff65)\uff89----------------------------------------------------------)\\n\");\r\n\r\n example.eval(\"System.out.println(System.getProperty(\\\"java.vm.version\\\"));\");\r\n example.eval(\"System.out.println(System.getProperty(\\\"java.class.version\\\"));\");\r\n System.out.println(\"(\u25cb\uff65\u03c9\uff65)\uff89----------------------------------------------------------)\\n\");\r\n\r\n example.close();\r\n\r\n }\r\n\r\n}\r\n\r\n<\/pre>\n
\u5b9f\u884c\u7d50\u679c\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
run:
import java.time.LocalTime;
<< Single-Type-Import Declaration. >>
@FunctionalInterface
interface Greeting<T, R> {
R apply(T time, R message);<\/p>\n
        default void sayGreeting(String greeting) {
            greeting(greeting);
        }<\/p>\n
        private void greeting(String greeting) {
            System.out.println(greeting + ” from JShellAPI.”);
        };
}
<< Created Interface: Greeting >>
LocalTime now = LocalTime.now();
<< A variable declaration with an initializer expression. >>
now ==> 17:28:24.474604
int hour = now.getHour();
<< A variable declaration with an initializer expression. >>
hour ==> 17
Greeting<Integer, String> greeting
                = (time, message) -> 4 <= time && time < 11 ? “Good morning!”
                        : 11 <= time && time < 18 ? “Good afternoon!”
                                : “Good evening!”;
<< A variable declaration with an initializer expression. >>
greeting ==> $Lambda$17\/555826066@a67c67e
String message = null;
<< A variable declaration with an initializer expression. >>
message ==> null
greeting.sayGreeting(greeting.apply(hour, message));
Good afternoon! from JShellAPI.
<< Statement: Snippet:StatementKey#7-greeting.sayGreeting(greeting.apply(hour, message)); >><\/p>\n
(\u25cb\uff65\u03c9\uff65)\uff89———————————————————-)<\/p>\n
Integer x = 128;
<< A variable declaration with an initializer expression. >>
x ==> 128
Integer y = 128;
<< A variable declaration with an initializer expression. >>
y ==> 128
void equivalenceTest(Integer x, Integer y) { System.out.println(x == y); }
<< Created Method: equivalenceTest(Integer,Integer) >>
equivalenceTest(x, y);
false
<< Statement: Snippet:StatementKey#11-equivalenceTest(x, y); >>
(\u25cb\uff65\u03c9\uff65)\uff89———————————————————-)<\/p>\n
import java.util.Arrays;
<< Single-Type-Import Declaration. >>
String str;
<< A variable declaration without initializer. >>
str ==> null
str = “Java”;
<< An assignment expression. >>
str ==> “Java”
String[] elems = str.split(“”);
<< A variable declaration with an initializer expression. >>
elems ==> String[4] { “J”, “a”, “v”, “a” }
System.out.println(Arrays.toString(elems));
[J, a, v, a]
<< Statement: Snippet:StatementKey#16-System.out.println(Arrays.toString(elems)); >>
Arrays.stream(elems).forEach(System.out::println);
J
a
v
a
<< Statement: Snippet:StatementKey#17-Arrays.stream(elems).forEach(System.out::println); >>
(\u25cb\uff65\u03c9\uff65)\uff89———————————————————-)<\/p>\n
public enum JavaPlusYou {<\/p>\n
    Japanese(“\u3042\u306a\u305f\u3068JAVA,\u4eca\u3059\u3050\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9”),
    English(“JAVA+YOU, DOWNLOAD TODAY!”);<\/p>\n
    private final String downloadNow;<\/p>\n
    private JavaPlusYou(final String downloadNow) {
        this.downloadNow = downloadNow;
    }<\/p>\n
    public String getDownloadNow() {
        return downloadNow;
    }<\/p>\n
}
<< Created Enum: JavaPlusYou >>
for (JavaPlusYou jpy : JavaPlusYou.values()) {
            System.out.println(jpy + “: ” + jpy.getDownloadNow());
        }
Japanese: \u3042\u306a\u305f\u3068JAVA,\u4eca\u3059\u3050\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9
English: JAVA+YOU, DOWNLOAD TODAY!
<< Statement: Snippet:StatementKey#19-for (JavaPlusYou jpy : JavaPlusYou.values()) {
            System.out.println(jpy + “: ” + jpy.getDownloadNow());
        } >>
(\u25cb\uff65\u03c9\uff65)\uff89———————————————————-)<\/p>\n
System.out.println(System.getProperty(“java.vm.version”));
9-ea+169
<< Statement: Snippet:StatementKey#20-System.out.println(System.getProperty(“java.vm.version”)); >>
System.out.println(System.getProperty(“java.class.version”));
53.0
<< Statement: Snippet:StatementKey#21-System.out.println(System.getProperty(“java.class.version”)); >>
(\u25cb\uff65\u03c9\uff65)\uff89———————————————————-)<\/p>\n
\u30d3\u30eb\u30c9\u6210\u529f(\u5408\u8a08\u6642\u9593: 4\u79d2)<\/p>\n
Hatena \u30bf\u30b0: Java<\/a>,NetBeans<\/a><\/div>\n
\n
$\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u306f\u3066\u306a\u30d6\u30c3\u30af\u30de\u30fc\u30af\u306b\u8ffd\u52a0$ <\/a><\/div>\n
$Facebook \u306b\u30b7\u30a7\u30a2$ <\/a><\/div>\n
<\/g:plusone><\/div>\n
Tweet<\/a><\/div>\n <\/div>\n
\n","protected":false},"excerpt":{"rendered":"
Java SE 9 \u306e\u4e88\u7fd2 \u305d\u306e\uff14\u3067\u3059\u3002 \u524d\u56de\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u306e\u7d9a\u304d\u3067\u304a\u305d\u3089\u304f\u4eca\u56de\u3082\u5fc5\u8981\u3068\u3055\u308c\u306a\u3044\u7121\u99c4\u306a\u304a\u904a\u3073\u3068\u306a\u308a\u307e\u3059\u3002 \u4eca\u56de\u306f JShell API \u3092\u5229\u7528\u3057\u3066\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5185\u3067\u30b9\u30cb\u30da\u30c3\u30c8\u306e\u8a55\u4fa1\u3084\u5b9f\u884c\u3092\u8a66\u3057\u3066\u307f\u307e\u3059\u3002 \u306a\u304a\u3001\u4eca\u56de\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u306b\u306f \u300cJava SE 9\u306eProject Kulla\u3001JShell\u306e\u52d5\u4f5c\u3068JShell API \uff083\/4\uff09(JShell API)\u300d\u306e\u8a18\u4e8b\u3092\u53c2\u8003\u306b\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002 \u307b\u3068\u3093\u3069\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u4e38\u5199\u3057\u72b6\u614b\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u306e\u3067\u5143\u8a18\u4e8b\u3092\u307e\u305a\u8aad\u3093\u3067\u7406\u89e3\u3057\u3066\u3053\u306e\u304a\u904a\u3073\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u582a\u80fd\u3057\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u5e78\u3044\u3067\u3059\u3002 \u4e0b\u8a18\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u666e\u901a\u306b19\u884c\u76ee\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067 JSh\u2026<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,4],"tags":[17,19],"class_list":["post-2357","post","type-post","status-publish","format-standard","hentry","category-java","category-netbeans","tag-java","tag-netbeans"],"_links":{"self":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2357","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2357"}],"version-history":[{"count":1,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2357\/revisions"}],"predecessor-version":[{"id":2358,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2357\/revisions\/2358"}],"wp:attachment":[{"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2357"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yucchi.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}