Commit 01b6166

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Merge pull request giantray#87 from v2hoping/patch-1

更新了convert-a-string-to-an-enum-in-java,增加了一种常用回答

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Original file line number	Diff line number	Diff line change
`@@ -19,6 +19,38 @@ Enum.valueOf()是否能实现以上目的,如果是,那我如何使用?`
`19`	`19`
`20`	`20`	`### 其他答案`
`21`	`21`
	`22`	`+当文本和枚举值不同时,可以采用这种方式:`
	`23`	+```java
	`24`	`+public enum Blah {`
	`25`	`+ A("text1"),`
	`26`	`+ B("text2"),`
	`27`	`+ C("text3"),`
	`28`	`+ D("text4");`
	`29`	`+`
	`30`	`+ private String text;`
	`31`	`+`
	`32`	`+ Blah(String text) {`
	`33`	`+ this.text = text;`
	`34`	`+ }`
	`35`	`+`
	`36`	`+ public String getText() {`
	`37`	`+ return this.text;`
	`38`	`+ }`
	`39`	`+`
	`40`	`+ public static Blah fromString(String text) {`
	`41`	`+ for (Blah b : Blah.values()) {`
	`42`	`+ if (b.text.equalsIgnoreCase(text)) {`
	`43`	`+ return b;`
	`44`	`+ }`
	`45`	`+ }`
	`46`	`+ return null;`
	`47`	`+ }`
	`48`	`+}`
	`49`	+```
	`50`	`+fromString方法中,throw new IllegalArgumentException("No constant with text " + text + " found") 会比直接返回null更优秀.`
	`51`	`+`
	`52`	`+### 其他答案`
	`53`	`+`
`22`	`54`	`我有一个挺赞的工具方法:`
`23`	`55`	```java
`24`	`56`	`/**`
`@@ -47,4 +79,4 @@ public static MyEnum fromString(String name) {`
`47`	`79`	`}`
`48`	`80`	```
`49`	`81`
`50`		`-stackoverflow链接:http://stackoverflow.com/questions/604424/convert-a-string-to-an-enum-in-java`
	`82`	`+stackoverflow链接:http://stackoverflow.com/questions/604424/convert-a-string-to-an-enum-in-java`

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