blocks|key|534243|text|如果您的字符串只包含一个字符，则将其转换为字符的最简单方法可能是调用charAt方法：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|534244|char+c+=+s.charAt(0);|code-block|syntax|javascript|534245|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/6/docs/api/java/lang/String.html#charAt(int)^0|Y|6|Y|6|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

If your string contains exactly one character the simplest way to convert it to a character is probably to call the <a href="http://download.oracle.com/javase/6/docs/api/java/lang/String.html#charAt(int)" rel="noreferrer"><code>charAt</code></a> method:

<pre><code>char c = s.charAt(0);
</code></pre>

blocks|key|534307|text|您可以将.charAt(int)函数与字符串一起使用，以检索任何索引处的字符值。如果要将字符串转换为字符数组，请尝试对字符串调用.toCharArray()。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|534308|String+g+=+"line";
char+c+=+g.charAt(0);++//+returns+'l'
char[]+c_arr+=+g.toCharArray();+//+returns+a+length+4+char+array+['l','i','n','e']|code-block|syntax|javascript|534309|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#charAt(int)|1|https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#toCharArray()^0|4|C|0|1S|E|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

You can use the <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#charAt(int)" rel="noreferrer">.charAt(int)</a> function with Strings to retrieve the char value at any index. If you want to convert the String to a char array, try calling <a href="https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#toCharArray()" rel="noreferrer">.toCharArray()</a> on the String.

<pre><code>String g = "line";
char c = g.charAt(0); // returns 'l'
char[] c_arr = g.toCharArray(); // returns a length 4 char array ['l','i','n','e']
</code></pre>

blocks|key|750641|text|你可以使用这个技巧：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|750642|String+s+=+"p";

char+c+=+s.charAt(0);|code-block|syntax|javascript|750643|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 use this trick :

<pre><code>String s = "p";

char c = s.charAt(0);
</code></pre>

blocks|key|750782|text|如果字符串长度为1个字符，则只需使用take+that+character。如果字符串长度不是1个字符，则无法将其解析为字符。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|750783|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/7/docs/api/java/lang/String.html#charAt%2528int%2529^0|I|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

If the string is 1 character long, just <a href="http://download.oracle.com/javase/7/docs/api/java/lang/String.html#charAt%28int%29" rel="noreferrer">take that character</a>. If the string is not 1 character long, it cannot be parsed into a character.

blocks|key|534717|text|我发现这很有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|534718|double++-->+Double.parseDouble(String);
float+++-->+Float.parseFloat(String);
long++++-->+Long.parseLong(String);
int+++++-->+Integer.parseInt(String);
char++++-->+stringGoesHere.charAt(int+position);
short+++-->+Short.parseShort(String);
byte++++-->+Byte.parseByte(String);
boolean+-->+Boolean.parseBoolean(String);|code-block|syntax|javascript|534719|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|$]]

I found this useful:
<pre><code>double --&gt; Double.parseDouble(String);
float --&gt; Float.parseFloat(String);
long --&gt; Long.parseLong(String);
int --&gt; Integer.parseInt(String);
char --&gt; stringGoesHere.charAt(int position);
short --&gt; Short.parseShort(String);
byte --&gt; Byte.parseByte(String);
boolean --&gt; Boolean.parseBoolean(String);
</code></pre>

blocks|key|534586|text|+String+string+=+"This+is+Yasir+Shabbir+";
+for(char+ch+:+string.toCharArray()){

+}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|534587|或者，如果您想单独使用，则可以|unstyled|534588|char+ch+=+string.charAt(1);|534589|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code> String string = "This is Yasir Shabbir ";
 for(char ch : string.toCharArray()){

 }
</code></pre>

or If you want individually then you can as

<pre><code>char ch = string.charAt(1);
</code></pre>

blocks|key|750900|text|org.apache.commons.lang.StringEscapeUtils。(Un)EscapeJava方法是你想要的东西|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|750901|答案来自brainzzy而不是我：|750902|https://stackoverflow.com/a/8736043/1130448|750903|entityMap|0|LINK|mutability|MUTABLE|url|http://commons.apache.org/lang/api-2.4/org/apache/commons/lang/StringEscapeUtils.html#unescapeJava%2528java.lang.String|1^0|0|15|0|0|0|0|17|1|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@$A|W|B|X|1|Y]]|C|$]]|$1|H|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|G]]]]

<a href="http://commons.apache.org/lang/api-2.4/org/apache/commons/lang/StringEscapeUtils.html#unescapeJava%28java.lang.String" rel="nofollow noreferrer">org.apache.commons.lang.StringEscapeUtils</a>.(un)EscapeJava methods are probaby what you want

Answer from brainzzy not mine :

<a href="https://stackoverflow.com/a/8736043/1130448">https://stackoverflow.com/a/8736043/1130448</a>

blocks|key|750967|text|将String转换为char的最简单方法是使用charAt()|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|750968|String+stringAns="hello";
char+charAns=stringAns.charAt(0);//Gives+You+'h'
char+charAns=stringAns.charAt(1);//Gives+You+'e'
char+charAns=stringAns.charAt(2);//Gives+You+'l'
char+charAns=stringAns.charAt(3);//Gives+You+'l'
char+charAns=stringAns.charAt(4);//Gives+You+'o'
char+charAns=stringAns.charAt(5);//Gives+You::+Exception+in+thread+"main"+java.lang.StringIndexOutOfBoundsException:+String+index+out+of+range:+5|code-block|syntax|javascript|750969|下面是一个完整的脚本：|750970|import+java.util.Scanner;

class+demo+{
++++String+accNo,name,fatherName,motherName;
++++int+age;
++++static+double+rate=0.25;
++++static+double+balance=1000;
++++Scanner+scanString=new+Scanner(System.in);
++++Scanner+scanNum=new+Scanner(System.in);

++++void+input()
++++{
++++++++System.out.print("Account+Number:");
++++++++accNo=scanString.nextLine();
++++++++System.out.print("Name:");
++++++++name=scanString.nextLine();
++++++++System.out.print("Father's+Name:");
++++++++fatherName=scanString.nextLine();
++++++++System.out.print("Mother's+Name:");
++++++++motherName=scanString.nextLine();
++++++++System.out.print("Age:");
++++++++age=scanNum.nextInt();
++++++++System.out.println();
++++}

++++void+withdraw()+{
++++++++System.out.print("How+Much:");
++++++++double+withdraw=scanNum.nextDouble();
++++++++balance=balance-withdraw;
++++++++if(balance<1000)
++++++++{
++++++++++++System.out.println("Invalid+Data+Entry\n+Balance+below+Rs+1000+not+allowed");
++++++++++++System.exit(0);
++++++++}+++++++
++++}

++++void+deposit()+{
++++++++System.out.print("How+Much:");
++++++++double+deposit=scanNum.nextDouble();
++++++++balance=balance%2Bdeposit;
++++}

++++void+display()+{
++++++++System.out.println("Your++Balnce:Rs+"%2Bbalance);
++++}

++++void+oneYear()+{
++++++++System.out.println("After+one+year:");
++++++++balance%2B=balance*rate*0.01;
++++}

++++public+static+void+main(String+args[])+{
++++++++demo+d1=new+demo();
++++++++d1.input();
++++++++d1.display();
++++++++while(true)+{//Withdraw/Deposit
++++++++++++System.out.println("Withdraw/Deposit+Press+W/D:");
++++++++++++String+reply1=+((d1.scanString.nextLine()).toLowerCase()).trim();
++++++++++++char+reply=reply1.charAt(0);
++++++++++++if(reply=='w')+{
++++++++++++++++d1.withdraw();
++++++++++++}
++++++++++++else+if(reply=='d')+{
++++++++++++++++d1.deposit();
++++++++++++}
++++++++++++else+{
++++++++++++++++System.out.println("Invalid+Entry");
++++++++++++}
++++++++++++//More+Manipulation+
++++++++++++System.out.println("Want+More+Manipulations:+Y/N:");
++++++++++++String+manipulation1=+((d1.scanString.nextLine()).toLowerCase()).trim();

++++++++++++char+manipulation=manipulation1.charAt(0);
++++++++++++System.out.println(manipulation);

++++++++++++if(manipulation=='y')+{+}
++++++++++++else+if(manipulation=='n')+{
++++++++++++++++break;
++++++++++++}
++++++++++++else+{
++++++++++++++++System.out.println("Invalid+Entry");
++++++++++++++++break;
++++++++++++}
++++++++}+++

++++++++d1.oneYear();
++++++++d1.display();+++
++++}
}|750971|entityMap^0|1|6|A|4|N|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|10|8|@]|D|@]|E|$]]]|P|$]]

The simplest way to convert a <code>String</code> to a <code>char</code> is using <code>charAt()</code>:

<pre><code>String stringAns="hello";
char charAns=stringAns.charAt(0);//Gives You 'h'
char charAns=stringAns.charAt(1);//Gives You 'e'
char charAns=stringAns.charAt(2);//Gives You 'l'
char charAns=stringAns.charAt(3);//Gives You 'l'
char charAns=stringAns.charAt(4);//Gives You 'o'
char charAns=stringAns.charAt(5);//Gives You:: Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 5
</code></pre>

Here is a full script:

<pre><code>import java.util.Scanner;

class demo {
 String accNo,name,fatherName,motherName;
 int age;
 static double rate=0.25;
 static double balance=1000;
 Scanner scanString=new Scanner(System.in);
 Scanner scanNum=new Scanner(System.in);

 void input()
 {
 System.out.print("Account Number:");
 accNo=scanString.nextLine();
 System.out.print("Name:");
 name=scanString.nextLine();
 System.out.print("Father's Name:");
 fatherName=scanString.nextLine();
 System.out.print("Mother's Name:");
 motherName=scanString.nextLine();
 System.out.print("Age:");
 age=scanNum.nextInt();
 System.out.println();
 }

 void withdraw() {
 System.out.print("How Much:");
 double withdraw=scanNum.nextDouble();
 balance=balance-withdraw;
 if(balance&lt;1000)
 {
 System.out.println("Invalid Data Entry\n Balance below Rs 1000 not allowed");
 System.exit(0);
 } 
 }

 void deposit() {
 System.out.print("How Much:");
 double deposit=scanNum.nextDouble();
 balance=balance+deposit;
 }

 void display() {
 System.out.println("Your Balnce:Rs "+balance);
 }

 void oneYear() {
 System.out.println("After one year:");
 balance+=balance*rate*0.01;
 }

 public static void main(String args[]) {
 demo d1=new demo();
 d1.input();
 d1.display();
 while(true) {//Withdraw/Deposit
 System.out.println("Withdraw/Deposit Press W/D:");
 String reply1= ((d1.scanString.nextLine()).toLowerCase()).trim();
 char reply=reply1.charAt(0);
 if(reply=='w') {
 d1.withdraw();
 }
 else if(reply=='d') {
 d1.deposit();
 }
 else {
 System.out.println("Invalid Entry");
 }
 //More Manipulation 
 System.out.println("Want More Manipulations: Y/N:");
 String manipulation1= ((d1.scanString.nextLine()).toLowerCase()).trim();

 char manipulation=manipulation1.charAt(0);
 System.out.println(manipulation);

 if(manipulation=='y') { }
 else if(manipulation=='n') {
 break;
 }
 else {
 System.out.println("Invalid Entry");
 break;
 }
 } 

 d1.oneYear();
 d1.display(); 
 }
}
</code></pre>

blocks|key|750986|text|import+java.io.*;
class+ss1+
{
++++public+static+void+main(String+args[])+
++++{
++++++++String+a+=+new+String("sample");
++++++++System.out.println("Result:+");
++++++++for(int+i=0;i<a.length();i%2B%2B)
++++++++{
++++++++++++System.out.println(a.charAt(i));
++++++++}
++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|750987|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>import java.io.*;
class ss1 
{
 public static void main(String args[]) 
 {
 String a = new String("sample");
 System.out.println("Result: ");
 for(int i=0;i&lt;a.length();i++)
 {
 System.out.println(a.charAt(i));
 }
 }
}
</code></pre>

blocks|key|751041|text|您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|751042|String+str+=+"abcd";
char+arr[]+=+new+char[len];+//+len+is+the+length+of+the+array
arr+=+str.toCharArray();|code-block|syntax|javascript|751043|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 do the following:

<pre><code>String str = "abcd";
char arr[] = new char[len]; // len is the length of the array
arr = str.toCharArray();
</code></pre>

blocks|key|751172|text|您可以简单地使用toCharArray()将字符串转换为字符数组：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|751173|++++Scanner+s=new+Scanner(System.in);
++++System.out.print("Enter+some+String:");
++++String+str=s.nextLine();
++++char+a[]=str.toCharArray();|code-block|syntax|javascript|751174|entityMap^0|8|D|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You can simply use the <code>toCharArray()</code> to convert a string to char array:

<pre><code> Scanner s=new Scanner(System.in);
 System.out.print("Enter some String:");
 String str=s.nextLine();
 char a[]=str.toCharArray();
</code></pre>

blocks|key|751098|text|您可以将.charAt(int)函数与字符串一起使用，以检索任何索引处的字符值。如果要将字符串转换为字符数组，请尝试对字符串调用.toCharArray()。如果字符串长度为1个字符，则只需调用.charAt(0)+(或C#中的.First()+)即可获取该字符。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|751099|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.oracle.com/javase/10/docs/api/java/lang/String.html#charAt(int)|1|https://docs.oracle.com/javase/10/docs/api/java/lang/String.html#toCharArray()^0|4|C|0|1S|E|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

You can use the <a href="https://docs.oracle.com/javase/10/docs/api/java/lang/String.html#charAt(int)" rel="nofollow noreferrer">.charAt(int)</a> function with Strings to retrieve the char value at any index. If you want to convert the String to a char array, try calling <a href="https://docs.oracle.com/javase/10/docs/api/java/lang/String.html#toCharArray()" rel="nofollow noreferrer">.toCharArray()</a> on the String. If the string is 1 character long, just take that character by calling .charAt(0) (or .First() in C#).

How do I parse a <code>String</code> value to a <code>char</code> type, in Java? 

I know how to do it to int and double (for example <code>Integer.parseInt("123")</code>).
Is there a class for Strings and Chars?

How to convert/parse from String to char in java?

Java

在Java语言中，如何将String值解析为char类型？我知道如何处理整型和双精度型(例如Integer.parseInt("123"))。有字符串和字符的类吗？

问如何在java中将字符串转换/解析为字符？
EN

回答 12

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问如何在java中将字符串转换/解析为字符？EN

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问如何在java中将字符串转换/解析为字符？
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