Javac语法糖之增强for循环

【Javac语法糖之增强for循环】的更多相关文章

Javac语法糖之增强for循环

加强的for循环有两种,遍历数组和实现了Iterable接口的容器.javac通过visitForeachLoop()方法来实现解语法糖,代码如下: /** Translate away the foreach loop. */ public void visitForeachLoop(JCEnhancedForLoop tree) { if (types.elemtype(tree.expr.type) == null) visitIterableForeachLoop(tree); else…

Javac语法糖之内部类

在Javac中解语法糖主要是Lower类来完成,调用这个类的入口函数translateTopLevelClass即可.这个方法只是JavacCompiler类的desugar方法中进行了调用. 首先来看下local class本地类解语法糖,举个例子,如下: class Outer { class AOuter{ int temp = 0; } final int count1 = new Integer(1); final int count2 = 1; static final int co…

Javac语法糖之EnumSwitch

在Switch中可以使用的类型有枚举.字符串类型与整形int类型,下面来具体看这几个类型. 1.switch为枚举类型枚举类: enum Fruit { APPLE,ORINGE } 调用javac生成的代码如下: enum Fruit{ private <init>(/*synthetic*/ String $enum$name, /*synthetic*/ int $enum$ordinal) { super($enum$name, $enum$ordinal); } /*public…

Javac语法糖之其它

1.变长参数 class VarialbeArgumentsDemo { public static void doWork(int... a) {//可变参数 } public static void main(String[] args) { doWork(1); doWork(1,2,3); } } 经过反编译后的代码如下: class VarialbeArgumentsDemo { VarialbeArgumentsDemo() { } public static void doWork…

Javac语法糖之TryCatchFinally

https://docs.oracle.com/javase/specs/jls/se7/html/jls-14.html#jls-14.20.3 Optionally replace a try statement with the desugaring of a try-with-resources statement. The canonical desugaring of try ResourceSpecification Block is { final VariableModifie…

Javac语法糖之Enum类

枚举类在Javac中是被当作类来看待的. An enum type is implicitly final unless it contains at least one enum constant that has a class body. 举例如下: enum EnumTest { MON(1), TUE(2), WED(3), THU(4), FRI(5), SAT(6) { @Override public boolean isRest() { return true; } }, SU…