18 de agosto de 2024
StringWriter (Java SE 21 & JDK 21) en Java con ejemplos.
Encontrará ejemplos de código en la mayoría de los métodos de StringWriter.
Nota :
- Este artículo puede utilizar software de traducción para su comodidad. Consulte también la versión original en inglés.
Summary
Un flujo de caracteres que recoge su salida en un búfer de cadena, que luego puede utilizarse para construir una cadena. (Traducción automática)
final var writer = new StringWriter();
writer.write("abcd");
writer.write('-');
writer.write("XYZ");
System.out.println(writer); // abcd-XYZ
final var writer = new StringWriter();
final var ret = writer.append("ABCD").append('-').append("xyz");
System.out.println(ret); // ABCD-xyz
Fields declared in Writer
Constructors
StringWriter ()
Crea un nuevo escritor de cadenas utilizando el tamaño de búfer de cadena inicial predeterminado. (Traducción automática)
final var writer = new StringWriter();
writer.write("abcd");
writer.write('-');
writer.write("XYZ");
System.out.println(writer); // abcd-XYZ
StringWriter (int initialSize)
Crea un nuevo escritor de cadenas utilizando el tamaño de búfer de cadena inicial especificado. (Traducción automática)
final var writer1 = new StringWriter();
System.out.println(writer1.getBuffer().capacity()); // 16
final var writer2 = new StringWriter(128);
System.out.println(writer2.getBuffer().capacity()); // 128
Methods
StringWriter append (char c)
Añade el carácter especificado a este escritor. (Traducción automática)
final var writer = new StringWriter();
System.out.println(writer.append('a')); // a
System.out.println(writer.append('b')); // ab
System.out.println(writer.append('X').append('Y').append('Z')); // abXYX
StringWriter append (CharSequence csq)
Añade la secuencia de caracteres especificada a este escritor. (Traducción automática)
final var writer = new StringWriter();
final var ret = writer.append("abc").append("XYZ");
System.out.println(ret); // abcXYZ
final var writer = new StringWriter();
final CharSequence csq1 = "abc";
System.out.println(writer.append(csq1)); // abc
final var sb = new StringBuilder();
final CharSequence csq2 = sb;
sb.append("XY");
System.out.println(writer.append(csq2)); // abcXY
sb.append("Z");
System.out.println(writer.append(csq2)); // abcXYXYZ
StringWriter append (CharSequence csq, int start, int end)
Añade una subsecuencia de la secuencia de caracteres especificada a este escritor. (Traducción automática)
final var csq = "abcd";
System.out.println(new StringWriter().append(csq, 0, 1)); // a
System.out.println(new StringWriter().append(csq, 0, 2)); // ab
System.out.println(new StringWriter().append(csq, 0, 3)); // abc
System.out.println(new StringWriter().append(csq, 0, 4)); // abcd
//new StringWriter().append(csq, 0, 5); // StringIndexOutOfBoundsException
final var csq = "abcd";
System.out.println(new StringWriter().append(csq, 0, 4)); // abcd
System.out.println(new StringWriter().append(csq, 1, 4)); // bcd
System.out.println(new StringWriter().append(csq, 2, 4)); // cd
System.out.println(new StringWriter().append(csq, 3, 4)); // d
void close ()
Cerrar un StringWriter no tiene ningún efecto. (Traducción automática)
final var writer = new StringWriter();
// Closing a stream has no effect.
writer.close();
// The methods in this class can be called after the stream has been closed.
writer.append("abcd");
System.out.println(writer); // abcd
void flush ()
Limpiar la corriente. (Traducción automática)
final var writer = new StringWriter();
writer.append("abc");
System.out.println(writer);
// The flush method of StringWriter does nothing.
writer.flush();
writer.append("XYZ");
System.out.println(writer); // abcXYZ
StringBuffer getBuffer ()
Devuelve el buffer de cadena en sí. (Traducción automática)
final var writer = new StringWriter();
writer.append("abc");
System.out.println(writer); // abc
final var buffer = writer.getBuffer();
System.out.println(buffer); // abc
buffer.append(123);
buffer.append("XYZ");
System.out.println(buffer); // abc123XYZ
System.out.println(writer); // abc123XYZ
String toString ()
Devuelve el valor actual del buffer como una cadena. (Traducción automática)
final var writer = new StringWriter();
writer.append("abc");
final var ret1 = writer.toString();
System.out.println(ret1); // abc
writer.append("XYZ");
final var ret2 = writer.toString();
System.out.println(ret2); // abcXYZ
void write (char[] cbuf, int off, int len)
Escribe una parte de una matriz de caracteres. (Traducción automática)
final char[] cbuf = {'a', 'b', 'c', 'd'};
{
final var writer = new StringWriter();
writer.write(cbuf, 0, 1);
System.out.println(writer); // a
}
{
final var writer = new StringWriter();
writer.write(cbuf, 0, 2);
System.out.println(writer); // ab
}
{
final var writer = new StringWriter();
writer.write(cbuf, 0, 3);
System.out.println(writer); // abc
}
{
final var writer = new StringWriter();
writer.write(cbuf, 0, 4);
System.out.println(writer); // abcd
}
{
final var writer = new StringWriter();
//writer.write(cbuf, 0, 5); // IndexOutOfBoundsException
}
final char[] cbuf = {'a', 'b', 'c', 'd'};
{
final var writer = new StringWriter();
writer.write(cbuf, 0, 4);
System.out.println(writer); // abcd
}
{
final var writer = new StringWriter();
writer.write(cbuf, 1, 3);
System.out.println(writer); // bcd
}
{
final var writer = new StringWriter();
writer.write(cbuf, 2, 2);
System.out.println(writer); // cd
}
{
final var writer = new StringWriter();
writer.write(cbuf, 3, 1);
System.out.println(writer); // d
}
void write (int c)
Escribe un solo caracter. (Traducción automática)
final var writer = new StringWriter();
writer.write('a');
System.out.println(writer); // a
writer.write('b');
System.out.println(writer); // ab
writer.write('X');
System.out.println(writer); // abX
writer.write('Y');
System.out.println(writer); // abXY
writer.write('Z');
System.out.println(writer); // abXYZ
void write (String str)
Escribe una cadena. (Traducción automática)
final var writer = new StringWriter();
writer.write("abc");
System.out.println(writer); // abc
writer.write("XYZ");
System.out.println(writer); // abcXYZ
void write (String str, int off, int len)
Escribe una porción de una cadena. (Traducción automática)
final var str = "abcd";
{
final Writer writer = new StringWriter();
writer.write(str, 0, 1);
System.out.println(writer); // a
}
{
final Writer writer = new StringWriter();
writer.write(str, 0, 2);
System.out.println(writer); // ab
}
{
final Writer writer = new StringWriter();
writer.write(str, 0, 3);
System.out.println(writer); // abc
}
{
final Writer writer = new StringWriter();
writer.write(str, 0, 4);
System.out.println(writer); // abcd
}
{
final Writer writer = new StringWriter();
//writer.write(str, 0, 5); // IndexOutOfBoundsException
}
final var str = "abcd";
{
final Writer writer = new StringWriter();
writer.write(str, 0, 4);
System.out.println(writer); // abcd
}
{
final Writer writer = new StringWriter();
writer.write(str, 1, 3);
System.out.println(writer); // bcd
}
{
final Writer writer = new StringWriter();
writer.write(str, 2, 2);
System.out.println(writer); // cd
}
{
final Writer writer = new StringWriter();
writer.write(str, 3, 1);
System.out.println(writer); // d
}
Methods declared in Writer
Related posts
- Ejemplos de API