Det java string toUpperCase() metoden returnerer strengen med stort bogstav. Med andre ord konverterer den alle tegn i strengen til store bogstaver.
Metoden toUpperCase() fungerer på samme måde som toUpperCase(Locale.getDefault())-metoden. Den bruger internt standardlokaliteten.
Intern implementering
public String toUpperCase(Locale locale) { if (locale == null) { throw new NullPointerException(); } int firstLower; final int len = value.length; /* Now check if there are any characters that need to be changed. */ scan: { for (firstLower = 0 ; firstLower = Character.MIN_HIGH_SURROGATE) && (c <= character.max_high_surrogate)) { c="codePointAt(firstLower);" srccount="Character.charCount(c);" } else int uppercasechar="Character.toUpperCaseEx(c);" if ((uppercasechar="=" character.error) || (c !="upperCaseChar))" break scan; firstlower +="srcCount;" return this; char[] result="new" char[len]; * may grow resultoffset="0;" grow, so i+resultoffset is the write location in just copy first few uppercase characters. system.arraycopy(value, 0, result, firstlower); string lang="locale.getLanguage();" boolean localedependent="(lang" =="tr" 'az' 'lt'); upperchararray; upperchar; srcchar; srccount; for (int i="firstLower;" <len; srcchar="(int)value[i];" ((char)srcchar>= Character.MIN_HIGH_SURROGATE && (char)srcChar = Character.MIN_SUPPLEMENTARY_CODE_POINT)) { if (upperChar == Character.ERROR) { if (localeDependent) { upperCharArray = ConditionalSpecialCasing.toUpperCaseCharArray(this, i, locale); } else { upperCharArray = Character.toUpperCaseCharArray(srcChar); } } else if (srcCount == 2) { resultOffset += Character.toChars(upperChar, result, i + resultOffset) - srcCount; continue; } else { upperCharArray = Character.toChars(upperChar); } /* Grow result if needed */ int mapLen = upperCharArray.length; if (mapLen > srcCount) { char[] result2 = new char[result.length + mapLen - srcCount]; System.arraycopy(result, 0, result2, 0, i + resultOffset); result = result2; } for (int x = 0; x <maplen; ++x) { result[i + resultoffset x]="upperCharArray[x];" } - srccount); else resultoffset]="(char)upperChar;" return new string(result, 0, len resultoffset); < pre> <hr> <h3>Signature</h3> <p>There are two variant of toUpperCase() method. The signature or syntax of string toUpperCase() method is given below:</p> <pre> public String toUpperCase() public String toUpperCase(Locale locale) </pre> <p>The second method variant of toUpperCase(), converts all the characters into uppercase using the rules of given Locale.</p> <hr> <h3>Returns</h3> <p>string in uppercase letter.</p> <hr> <h2>Java String toUpperCase() method example</h2> <pre> public class StringUpperExample{ public static void main(String args[]){ String s1='hello string'; String s1upper=s1.toUpperCase(); System.out.println(s1upper); }} </pre> <span> Test it Now </span> <p>Output:</p> <pre> HELLO STRING </pre> <h2>Java String toUpperCase(Locale locale) Method Example 2</h2> <pre> import java.util.Locale; public class StringUpperExample2 { public static void main(String[] args) { String s = 'hello string'; String turkish = s.toUpperCase(Locale.forLanguageTag('tr')); String english = s.toUpperCase(Locale.forLanguageTag('en')); System.out.println(turkish);//will print I with dot on upper side System.out.println(english); } }</pre> <p>Output:</p> <pre> HELLO STR?NG HELLO STRING </pre></maplen;></=> Den anden metodevariant af toUpperCase(), konverterer alle tegnene til store bogstaver ved at bruge reglerne for den givne lokalitet.
Vender tilbage
streng med stort bogstav.
Java String toUpperCase() metode eksempel
public class StringUpperExample{ public static void main(String args[]){ String s1='hello string'; String s1upper=s1.toUpperCase(); System.out.println(s1upper); }} Test det nu Produktion:
HELLO STRING
Java String toUpperCase(Locale locale) Metode eksempel 2
import java.util.Locale; public class StringUpperExample2 { public static void main(String[] args) { String s = 'hello string'; String turkish = s.toUpperCase(Locale.forLanguageTag('tr')); String english = s.toUpperCase(Locale.forLanguageTag('en')); System.out.println(turkish);//will print I with dot on upper side System.out.println(english); } } Produktion:
HELLO STR?NG HELLO STRING