JAVA EE: April 2016

Java Tutorial : Java StringBuilder [subSequence(int start, int end) method]

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Java Tutorial : Java StringBuilder [subSequence(int start, int end) method]

SubSequenceDemo.java

/*
 * public CharSequence subSequence(int start, int end)
 * 
 * Parameters: 
 * ---------- 
 * start - the start index,inclusive.
 *  
 * end - the end index, exclusive.
 * 
 * Returns: 
 * ------- 
 * the specified subsequence.
 * 
 * Throws: 
 * ------ 
 * IndexOutOfBoundsException - if start or end 
 * are negative, if end is greater than length(),
 * or if start is greater than end.
 */
public class SubSequenceDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Welcome");
        CharSequence charSequence = sb.subSequence(3, 6);
        String strValue = (String) charSequence;
        System.out.println("strValue = " + strValue);

    }
}

Output

strValue = com

Refer:
https://docs.oracle.com/javase/8/docs/api/index.html?java/lang/CharSequence.html

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_subSequence_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_subSequence_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_subSequence_App/?at=master

See also:

Java Tutorial : Java StringBuilder [substring method]

Click here to watch in Youtube :
https://www.youtube.com/watch?v=3EHxg-45eb4&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [substring method]

SubStringDemo1.java

/*
 * public String substring(int start, int end)
 * 
 * Parameters: 
 * ---------- 
 * start - The beginning index,inclusive. 
 * 
 * end - The ending index, exclusive.
 * 
 * Returns: 
 * ------- 
 * The new string. 
 * 
 * Throws: 
 * ------
 * StringIndexOutOfBoundsException - if start or end are
 * negative or greater than length(), or start is
 * greater than end.
 */
public class SubStringDemo1
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Welcome");
        String subString = sb.substring(3, 6);
        System.out.println("subString = " + subString);
    }
}

Output

subString = com

SubStringDemo2.java

/*
 * public String substring(int start)
 * 
 * Parameters: 
 * ----------
 * start - The beginning index, inclusive.
 * 
 * Returns: 
 * -------
 * The new string.
 * 
 * Throws:
 * ------
 * StringIndexOutOfBoundsException - if start is less 
 * than zero, or greater than the length of this object.
 */

public class SubStringDemo2
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Welcome");
        String subString = sb.substring(3);
        System.out.println("subString = " + subString);

    }
}

Output

subString = come

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_substring_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_substring_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_substring_App/?at=master

See also:

Java Tutorial : Java StringBuilder [length() method]

Click here to watch in Youtube :
https://www.youtube.com/watch?v=aMOlLxjzPtI&list=UUhwKlOVR041tngjerWxVccw

StringBuilderDemo.java

/*
 * public int length()
 * 
 * Parameters: 
 * ----------
 * the length of the sequence of characters currently
 * represented by this object
 */
public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder();
        System.out.println("sb = " + sb);
        System.out.println("length = " + sb.length());

        sb.append("Welcome");
        System.out.println("sb = " + sb);
        System.out.println("length = " + sb.length());

    }
}

Output

sb = 
length = 0
sb = Welcome
length = 7

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_length_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_length_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_length_App/?at=master

See also:

Java Tutorial : Java StringBuilder [ensureCapacity(int minimumCapacity) method]

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https://www.youtube.com/watch?v=t9cMM9g7ZSg&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [ensureCapacity(int minimumCapacity) method]

StringBuilderDemo.java

/*
 * public void ensureCapacity(int minimumCapacity)
 * 
 * Parameters: 
 * ---------- 
 * minimumCapacity - the minimum desired capacity
 */
public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder();
        // default 16
        System.out.println("Old capacity = "+sb.capacity());

        sb.ensureCapacity(40);

        System.out.println("New Capacity = "+sb.capacity());
    }
}

Output

Old capacity = 16
New Capacity = 40

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_ensureCapacity_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_ensureCapacity_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_ensureCapacity_App/?at=master

See also:

Java Tutorial : Java StringBuilder [capacity() method]

Click here to watch in Youtube :
https://www.youtube.com/watch?v=3N0rJ1Vknj0&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [capacity() method]

StringBuilderDemo.java

/*
 * public int capacity()
 *  
 * Returns: 
 * -------- 
 * the current capacity
 */

public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder();
        // default 16
        System.out.println(sb.capacity());
        sb.append("Hello");
        // now 16
        System.out.println(sb.capacity());
        sb.append("Hello peter welcome to India");

        // now (16*2)+2=34 i.e (oldcapacity*2)+2
        System.out.println(sb.capacity());
    }
}

Output

16
16
34

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_capacity_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_capacity_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_capacity_App/?at=master

See also:

Java Tutorial : Java StringBuilder [deleteCharAt(int index) method]

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https://www.youtube.com/watch?v=AAwglHGQpbQ&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [deleteCharAt(int index) method]

StringBuilderDemo.java

/*
 * public StringBuilder deleteCharAt(int index)
 * 
 * Parameters: 
 * -----------
 * index - Index of char to remove
 * 
 * Returns:
 * --------
 * This object.
 * 
 * Throws:
 * -------
 * StringIndexOutOfBoundsException - if the index is negative 
 * or greater than or equal to length().
 * 
 */

public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Welcome");
        System.out.println(sb);
        sb = sb.deleteCharAt(2);
        System.out.println(sb);
    }
}

Output

Welcome
Wecome

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_deleteCharAt_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_deleteCharAt_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_deleteCharAt_App/?at=master

See also:

Java Tutorial : Java StringBuilder [delete(int start,int end) method]

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https://www.youtube.com/watch?v=qtIA8OLLXbI&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [delete(int start,int end) method]

StringBuilderDemo.java

/*
 * public StringBuilder delete(int start, int end)
 * 
 * Parameters: 
 * -----------
 * start - The beginning index, inclusive. 
 * 
 * end - The ending index, exclusive.
 * 
 * Returns:
 * --------
 * This object.
 */
public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Welcome");
        System.out.println(sb);
        sb = sb.delete(3, 6);
        System.out.println(sb);
    }
}

Output

Welcome
Wele

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_delete_str_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_delete_str_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_delete_str_App/?at=master

See also:

Java Tutorial : Java StringBuilder [reverse() method]

Click here to watch in Youtube :
https://www.youtube.com/watch?v=cFu9AOmDY5o&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [reverse() method]

StringBuilderDemo.java

/*
 * public StringBuilder reverse()
 *  
 * Returns: 
 * -------- 
 * a reference to this object.
 */
public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Hello");
        System.out.println(sb);
        sb = sb.reverse();
        System.out.println(sb);
    }
}

Output

Hello
olleH

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_reverse_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_reverse_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/4fb20859f2e7f390cc32dd6346f52d7d27c7a813/BasicJava/StringBuilderDemo_reverse_App/?at=master

See also:

Java Tutorial : Java StringBuilder [replace(int start,int end, String str) method]

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https://www.youtube.com/watch?v=b4qCUEj9EXY&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [replace(int start,int end, String str) method]

StringBuilderDemo.java

/*
 * public StringBuilder replace(int start, int end,
 *                                         String str)
 *        
 * Parameters: 
 * -----------   
 * start - The beginning index, inclusive.
 * 
 * end - The ending index, exclusive.
 * 
 * str - String that will replace previous contents.
 * 
 * Returns: 
 * -------- 
 * This object.
 * 
 * Throws:
 * -------
 * StringIndexOutOfBoundsException - if start is negative, 
 * greater than length(), or greater than end. 
 */
public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Hello Dave Welcome");
        System.out.println(sb);
        sb = sb.replace(6, 10, "Peter");
        System.out.println(sb);
    }
}

Output

Hello Dave Welcome
Hello Peter Welcome

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_replace_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_replace_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/bb94d904a4b291ce0b8aeae9cc6d268e0b410985/BasicJava/StringBuilderDemo_replace_App/?at=master

See also:

Wednesday 27 April 2016

Java Tutorial : Java StringBuilder [insert methods]

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https://www.youtube.com/watch?v=jsPkqqZTikY&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [insert methods]

StringBuilderDemo.java

public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Hello  World");
        System.out.println(sb);
        int intValue = 100;
        sb.insert(6, intValue);
        System.out.println(sb);
    }
}

Output

Hello  World
Hello 100 World

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_insert_methods_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_insert_methods_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/ea6705eb8d861d880326570ef3992b3db7646c7d/BasicJava/StringBuilderDemo_insert_methods_App/?at=master

See also:

Java Tutorial : Java StringBuilder [insert(int offset,String str) method]

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https://www.youtube.com/watch?v=i6-sKDJlLDc&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [insert(int offset,String str) method]

StringBuilderDemo.java

/*
 * public StringBuilder insert(int offset, String str)
 *
 * Parameters:
 * ----------
 * offset - the offset.
 * 
 * str - a string.
 *
 * Returns:
 * -------
 * a reference to this object.
 */
public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Hello  World");
        System.out.println(sb);
        String str = "My ";
        sb.insert(6, str);
        System.out.println(sb);
    }
}

Output

Hello  World
Hello My  World

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_insert_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_insert_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/ea6705eb8d861d880326570ef3992b3db7646c7d/BasicJava/StringBuilderDemo_insert_App/?at=master

See also:

Tuesday 26 April 2016

Java Tutorial : Java StringBuilder [append methods]

Click here to watch in Youtube :
https://www.youtube.com/watch?v=__3MMbzdczc&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [append methods]

StringBuilderDemo.java

public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("Hello ");
        int intValue = 20;
        sb.append(intValue);
        double doubleValue = 500.4;
        sb.append(doubleValue);
        System.out.println(sb);
    }
}

Output

Hello 20500.4

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_append_methods_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_append_methods_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/ea6705eb8d861d880326570ef3992b3db7646c7d/BasicJava/StringBuilderDemo_append_methods_App/?at=master

See also:

Java Tutorial : Java StringBuilder [append(StringBuffer sb) method]

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https://www.youtube.com/watch?v=w6yxMaMmAWo&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java StringBuilder [append(StringBuffer sb) method]

StringBuilderDemo.java

/*
 * public StringBuilder append(StringBuffer sb)
 * 
 * Appends the specified StringBuffer to this sequence.
 * 
 * Parameters:
 * ----------   
 * sb - the StringBuffer to append.
 * 
 * Returns:
 * -------
 * a reference to this object.
 */


public class StringBuilderDemo
{

    public static void main(String[] args)
    {
        StringBuilder stringbuilder = new StringBuilder("Hello ");
        StringBuffer stringBuffer = new StringBuffer("Java");
        stringbuilder.append(stringBuffer);
        System.out.println(stringbuilder);
    }
}

Output

Hello Java

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/StringBuilderDemo_append_sb_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StringBuilderDemo_append_sb_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/ea6705eb8d861d880326570ef3992b3db7646c7d/BasicJava/StringBuilderDemo_append_sb_App/?at=master

See also:

Java Tutorial : Java StringBuilder - Playlist

Click here to watch in Youtube :
https://www.youtube.com/watch?v=KZySy62D1gk&list=PLmCsXDGbJHdhcWsQZ5vSCbL2HudE0wzjw
See also: