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Commit441da8a

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author
rfadatare
committed
string api guide
0 parents  commit441da8a

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158 files changed

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‎pom.xml‎

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<projectxmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.javaguides.stringhandling</groupId>
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<artifactId>java-strings-guide</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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</project>
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packagecom.javaguides.stringbuffer.methods;
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publicclassAppendExample {
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publicstaticvoidmain(String[]args) {
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// 14 append overloaded methods
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// Append String
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StringBufferbuffer;
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buffer =newStringBuffer().append("guides");
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System.out.println("Append String : " +buffer);
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// Append char
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buffer =newStringBuffer().append('c');
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System.out.println("Append char : " +buffer);
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// Append Object
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buffer =newStringBuffer().append(newObject().getClass());
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System.out.println("Append Object : " +buffer);
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// Append chars
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char[]chars = {'j','a','v','a' };
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buffer =newStringBuffer().append(chars);
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System.out.println("Append chars : " +buffer);
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// Append charSequence
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CharSequencecharSequence =newString("charSequence");
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buffer =newStringBuffer().append(charSequence);
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System.out.println("Append charSequence : " +buffer);
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// Append Double
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buffer =newStringBuffer().append(10.0d);
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System.out.println("Append Double : " +buffer);
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// Append Float
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buffer =newStringBuffer().append(10.5f);
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System.out.println("Append Float : " +buffer);
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// Append int
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buffer =newStringBuffer().append(100);
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System.out.println("Append int : " +buffer);
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// Append Boolean
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buffer =newStringBuffer().append(true);
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System.out.println("Append Boolean : " +buffer);
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// Append Long
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buffer =newStringBuffer().append(1000);
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System.out.println("Append Long : " +buffer);
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// Append stringbuffer
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buffer =newStringBuffer().append(newStringBuffer("stringbuffer"));
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System.out.println("Append stringbuffer : " +buffer);
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// Appends the string representation of a subarray of the char array
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// argument to this sequence.
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buffer =newStringBuffer().append(chars,1,3);
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System.out.println("Appends the string representation of a "
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+" subarray of the char array argument to this sequence. : " +buffer);
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// Appends a subsequence of the specified CharSequence to this sequence
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buffer =newStringBuffer().append("javaguides",0,9);
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System.out.println("Appends a subsequence of the specified "
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+" CharSequence to this sequence. : " +buffer);
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// Appends the string representation of the codePoint argument to this
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// sequence.
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buffer =newStringBuffer().appendCodePoint(5);
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System.out.println(
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"Appends the string representation of the "
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+" codePoint argument to this sequence. : " +buffer);
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassCapacityExample {
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publicstaticvoidmain(String[]args) {
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StringBufferbuilder =newStringBuffer("javaguides");
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intcapacity =builder.capacity();
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// inital capacity
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System.out.println(newStringBuffer().capacity());
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// intial capacity 16 + number of characters in string
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System.out.println("Capacity of the string :: " +capacity);
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassChatAtExample {
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publicstaticvoidmain(String[]args) {
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charAtExample1();
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//charAtExample2();
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charAtExample3();
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}
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publicstaticvoidcharAtExample1() {
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StringBufferbuffer =newStringBuffer("Welcome to string handling guide");
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charch1 =buffer.charAt(0);
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charch2 =buffer.charAt(5);
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charch3 =buffer.charAt(11);
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charch4 =buffer.charAt(20);
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System.out.println("Character at 0 index is: " +ch1);
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System.out.println("Character at 5th index is: " +ch2);
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System.out.println("Character at 11th index is: " +ch3);
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System.out.println("Character at 20th index is: " +ch4);
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}
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// IndexOutOfBoundsException - if the index argument is negative or not less
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// than the length of this string.
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publicstaticvoidcharAtExample2() {
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StringBufferbuilder =newStringBuffer("Java Guides");
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charch1 =builder.charAt(builder.length());
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System.out.println("character :: " +ch1);
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}
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// How to get first and last chanracter of the string
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publicstaticvoidcharAtExample3() {
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StringBufferbuffer =newStringBuffer("Java Guides");
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intstrLength =buffer.length() -1;
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// Fetching first character
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System.out.println("Character at 0 index is: " +buffer.charAt(0));
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// The last Character is present at the string length-1 index
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System.out.println("Character at last index is: " +buffer.charAt(strLength));
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassCodePointAtExample {
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publicstaticvoidmain(String[]args) {
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StringBufferbuffer =newStringBuffer("javaguides");
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intunicode =buffer.codePointAt(0);
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System.out.println("the character (Unicode code point) at the specified index is :: " +unicode);
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassCodePointBeforeExample {
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publicstaticvoidmain(String[]args) {
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StringBufferbuffer =newStringBuffer("javaguides");
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intunicode =buffer.codePointBefore(1);
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System.out.println("the character (Unicode code point) at the before specified index is :: " +unicode);
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassCodePointCountExample {
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publicstaticvoidmain(String[]args) {
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StringBufferbuffer =newStringBuffer("javaguides");
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System.out.println("length of the string :: " +buffer.length());
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intunicode =buffer.codePointCount(0,buffer.length());
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System.out.println("the character (Unicode code point) at the specified index is :: " +unicode);
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassDeleteExample {
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publicstaticvoidmain(String[]args) {
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StringBufferbuffer =newStringBuffer("javaguides");
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// start with index and end with end -1
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StringBuffersubBuffer =buffer.delete(0,4);
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System.out.println("Delete string 'java' from string 'javaguides' : " +subBuffer.toString());
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StringBuffersubBuilder1 =newStringBuffer("javaguides").deleteCharAt(4);
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System.out.println("Delete char 'g' from string 'javaguides' : " +subBuilder1);
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassEnsureCapacityExample {
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publicstaticvoidmain(String[]args) {
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StringBufferbuilder =newStringBuffer();
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builder.ensureCapacity(11);
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System.out.println(builder.capacity());
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builder.ensureCapacity(17);
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System.out.println(builder.capacity());
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}
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}
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packagecom.javaguides.stringbuffer.methods;
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publicclassGetCharsExample {
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publicstaticvoidmain(String[]args) {
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StringBufferbuffer =newStringBuffer("javaguides");
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char[]dst =newchar[buffer.length()];
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buffer.getChars(0,buffer.length(),dst,0);
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for (charc :dst) {
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System.out.println(c);
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}
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}
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}

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