38 lines
993 B
Lua
38 lines
993 B
Lua
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local lujavrite = require "lujavrite"
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-- Determine Java home to use
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java_home = os.getenv("JAVA_HOME")
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if java_home == nil then
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java_home = "/usr/lib/jvm/jre"
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end
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-- Initialize JVM
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lujavrite.init(java_home .. "/lib/server/libjvm.so", "-ea", "-esa")
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-- System.getProperty(key)
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function get_property(key)
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return lujavrite.call(
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"java/lang/System", "getProperty",
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"(Ljava/lang/String;)Ljava/lang/String;",
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key
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)
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end
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-- System.setProperty(key, value)
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function set_property(key, value)
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return lujavrite.call(
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"java/lang/System", "setProperty",
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"(Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;",
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key, value
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)
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end
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local java_version = get_property("java.version")
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print("Java version is " .. java_version)
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set_property("foo", "bar")
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print("foo is " .. get_property("foo"))
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local java_nil = lujavrite.call("java/lang/String", "valueOf", "(Ljava/lang/Object;)Ljava/lang/String;", nil)
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print("nil in Lua is " .. java_nil .. " in Java")
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