Java - StringWriter append(char c) method

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Description

The Java StringWriter append(char c) method appends the specified character to this writer.

Declaration

Following is the declaration for java.io.StringWriter.append(char c) method.

public StringWriter append(char c)

Parameters

c − The 16-bit character to append.

Return Value

This method returns this writer.

Exception

NA

Example - Usage of StringWriter append(char c) method

The following example shows the usage of StringWriter append(char c) method.

StringWriterDemo.java

package com.tutorialspoint;

import java.io.StringWriter;

public class StringWriterDemo {
   public static void main(String[] args) {
   
      // create a new writer
      StringWriter sw = new StringWriter();

      // append a char       
      System.out.println("" + sw.append("a"));
      System.out.println("" + sw.append("b"));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

a
ab

Example - Appending a Single Character

The following example shows the usage of StringWriter append(char c) method.

StringWriterDemo.java

package com.tutorialspoint;

import java.io.StringWriter;

public class StringWriterDemo {
   public static void main(String[] args) throws Exception {
      StringWriter sw = new StringWriter();

      sw.append('H');
      sw.append('i');

      System.out.println("Output: " + sw.toString());
   }
}

Output

Let us compile and run the above program, this will produce the following result−

Output: Hi

Explanation

• Appends 'H' and 'i' one by one to the StringWriter.

• The resulting output is "Hi".

Example - Using append in a Loop to Build a String

The following example shows the usage of StringWriter append(char c) method.

StringWriterDemo.java

package com.tutorialspoint;

import java.io.StringWriter;

public class StringWriterDemo {
   public static void main(String[] args) {
      StringWriter sw = new StringWriter();

      for (char c = 'A'; c <= 'E'; c++) {
         sw.append(c);
      }

      System.out.println("Alphabets: " + sw.toString());
   }
}

Output

Let us compile and run the above program, this will produce the following result−

Alphabets: ABCDE

Explanation

• A loop appends characters from 'A' to 'E' using the append(char c) method.

• The final string becomes "ABCDE".