RFR: 8297074: Use enhanced-for cycle instead of Enumeration in javax.crypto

[Weijun Wang]

On Mon, 7 Nov 2022 16:54:32 GMT, Andrey Turbanov <aturbanov at openjdk.org> wrote:

> java.util.Enumeration is a legacy interface from java 1.0.
> There are a few places with cycles which use it to iterate over collections. We can replace this manual cycle with enchanced-for, which is shorter and easier to read.

src/java.base/share/classes/javax/crypto/CryptoPermissions.java line 232:

> 230:         // find out if there is anything we should add into
> 231:         // ret.
> 232:         for (var entry : perms.entrySet()) {

Can we keep the old style? i.e. iterate over `for (var alg : this.perms.keySet())`?

Same with the change on line 270 below.

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PR: https://git.openjdk.org/jdk/pull/11022