blocks|key|1145881|text|f+=+Character.toUpperCase(f);
l+=+Character.toUpperCase(l);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1145882|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>f = Character.toUpperCase(f);
l = Character.toUpperCase(l);
</code></pre>

blocks|key|1145917|text|看看java.lang.Character类，它提供了许多有用的方法来转换或测试字符。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1145918|entityMap^0|2|J|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

Have a look at the <code>java.lang.Character</code> class, it provides a lot of useful methods to convert or test chars.

blocks|key|1145965|text|对于您的情况，最简单的解决方案是更改第一行，让它做相反的事情：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1145966|String+lower+=+Name.toUpperCase+();|code-block|syntax|javascript|1145967|当然，更改它的名称也是值得的。|1145968|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The easiest solution for your case - change the first line, let it do just the opposite thing:

<pre><code>String lower = Name.toUpperCase ();
</code></pre>

Of course, it's worth to change its name too.

blocks|key|931558|text|如果您在项目中包含apache+commons+lang+jar，那么最简单的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|931559|WordUtils.capitalize(Name)|code-block|syntax|javascript|931560|帮你处理所有的脏活。请参阅javadoc+here。|offset|length|931561|或者，您还可以使用capitalizeFully(String)方法，该方法也将其余字符小写。|931562|entityMap|0|LINK|mutability|MUTABLE|url|http://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/text/WordUtils.html#capitalize(java.lang.String)^0|0|0|L|4|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@$I|X|J|Y|1|Z]]|A|$]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

If you are including the apache commons lang jar in your project than the easiest solution would be to do:

<pre><code>WordUtils.capitalize(Name)
</code></pre>

takes care of all the dirty work for you.
See the javadoc <a href="http://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/text/WordUtils.html#capitalize(java.lang.String)" rel="nofollow noreferrer">here</a>

Alternatively, you also have a capitalizeFully(String) method which also lower cases the rest of the characters.

blocks|key|931635|text|因为您知道字符是小写的，所以可以减去相应的ASCII值，使其变为大写：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|931636|char+a+=+'a';
a+-=+32;
System.out.println("a+is+"+%2B+a);+//a+is+A|code-block|syntax|javascript|931637|这是一个可供参考的ASCII+table|offset|length|931638|entityMap|0|LINK|mutability|MUTABLE|url|https://www.cs.cmu.edu/~pattis/15-1XX/common/handouts/ascii.html^0|0|0|9|B|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Since you know the chars are lower case, you can subtract the according ASCII value to make them uppercase:

<pre><code>char a = 'a';
a -= 32;
System.out.println("a is " + a); //a is A
</code></pre>

Here is an <a href="https://www.cs.cmu.edu/~pattis/15-1XX/common/handouts/ascii.html" rel="nofollow">ASCII table</a> for reference

blocks|key|1146151|text|可以将.toUpperCase()直接应用于字符串变量，也可以将其作为属性应用于文本字段。例如：-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1146152|String+str;
TextView+txt;

str.toUpperCase();//+will+change+it+to+all+upper+case+OR
txt.append(str.toUpperCase());
txt.setText(str.toUpperCase());|code-block|syntax|javascript|1146153|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can apply the .toUpperCase() directly on String variables or as an attribute to text fields. Ex: - 

<pre><code>String str;
TextView txt;

str.toUpperCase();// will change it to all upper case OR
txt.append(str.toUpperCase());
txt.setText(str.toUpperCase());
</code></pre>

blocks|key|1146160|text|System.out.println(first.substring(0,1).toUpperCase());+
System.out.println(last.substring(0,1).toUpperCase());|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1146161|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>System.out.println(first.substring(0,1).toUpperCase()); 
System.out.println(last.substring(0,1).toUpperCase());
</code></pre>

<pre><code>String lower = Name.toLowerCase();
int a = Name.indexOf(" ",0);
String first = lower.substring(0, a);
String last = lower.substring(a+1);
char f = first.charAt(0);
char l = last.charAt(0);
System.out.println(l);
</code></pre>

how would i get the F and L variables converted to uppercase.

Converting a char to uppercase

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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String lower = Name.toLowerCase();int a = Name.indexOf(" ",0);String first = lower.substring(0, a);String last = lower.substring(a+1);char f = first.charAt(0);c...

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