Java CharArrayReader.read方法代码示例

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * java.io.CharArrayReader#mark(int)
 */
public void test_markI() throws IOException {
    cr = new CharArrayReader(hw);
    cr.skip(5L);
    cr.mark(100);
    cr.read();
    cr.reset();
    assertEquals("Test 1: Failed to mark correct position;",
            'W', cr.read());

    cr.close();
    try {
        cr.mark(100);
        fail("Test 2: IOException expected.");
    } catch (IOException e) {
        // Expected.
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * java.io.CharArrayReader#reset()
 */
public void test_reset() throws IOException {
    cr = new CharArrayReader(hw);
    cr.skip(5L);
    cr.mark(100);
    cr.read();
    cr.reset();
    assertEquals("Test 1: Reset failed to return to marker position.",
            'W', cr.read());

    cr.close();
    try {
        cr.reset();
        fail("Test 2: IOException expected.");
    } catch (IOException e) {
        // Expected.
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * @tests java.io.CharArrayWriter#reset()
 */
@TestTargetNew(
    level = TestLevel.COMPLETE,
    notes = "Verifies reset() method.",
    method = "reset",
    args = {}
)
public void test_reset() {
    // Test for method void java.io.CharArrayWriter.reset()
    cw.write("HelloWorld", 5, 5);
    cw.reset();
    cw.write("HelloWorld", 0, 5);
    cr = new CharArrayReader(cw.toCharArray());
    try {
        char[] c = new char[100];
        cr.read(c, 0, 5);
        assertEquals("Reset failed to reset buffer",
                     "Hello", new String(c, 0, 5));
    } catch (IOException e) {
        fail("Exception during reset test : " + e.getMessage());
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * @tests java.io.CharArrayWriter#toCharArray()
 */
@TestTargetNew(
    level = TestLevel.COMPLETE,
    notes = "Verifies toCharArray() method.",
    method = "toCharArray",
    args = {}
)
public void test_toCharArray() {
    // Test for method char [] java.io.CharArrayWriter.toCharArray()
    cw.write("HelloWorld", 0, 10);
    cr = new CharArrayReader(cw.toCharArray());
    try {
        char[] c = new char[100];
        cr.read(c, 0, 10);
        assertEquals("toCharArray failed to return correct array",
                     "HelloWorld", new String(c, 0, 10));
    } catch (IOException e) {
        fail("Exception during toCharArray test : " + e.getMessage());
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * @tests java.io.CharArrayWriter#write(char[], int, int)
 */
@TestTargetNew(
    level = TestLevel.PARTIAL_COMPLETE,
    method = "write",
    args = {char[].class, int.class, int.class}
)
public void test_write$CII() {
    // Test for method void java.io.CharArrayWriter.write(char [], int, int)
    cw.write(hw, 5, 5);
    cr = new CharArrayReader(cw.toCharArray());
    try {
        char[] c = new char[100];
        cr.read(c, 0, 5);
        assertEquals("Writer failed to write correct chars",
                     "World", new String(c, 0, 5));
    } catch (IOException e) {
        fail("Exception during write test : " + e.getMessage());
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * @tests java.io.CharArrayWriter#write(java.lang.String, int, int)
 */
@TestTargetNew(
    level = TestLevel.COMPLETE,
    notes = "Verifies write(java.lang.String, int, int) method. [Need to check different strings?]",
    method = "write",
    args = {java.lang.String.class, int.class, int.class}
)
public void test_writeLjava_lang_StringII() {
    // Test for method void java.io.CharArrayWriter.write(java.lang.String,
    // int, int)
    cw.write("HelloWorld", 5, 5);
    cr = new CharArrayReader(cw.toCharArray());
    try {
        char[] c = new char[100];
        cr.read(c, 0, 5);
        assertEquals("Writer failed to write correct chars",
                     "World", new String(c, 0, 5));
    } catch (IOException e) {
        fail("Exception during write test : " + e.getMessage());
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * @tests java.io.CharArrayReader#close()
 */
@TestTargetNew(
    level = TestLevel.COMPLETE,
    notes = "Verifies close() method.",
    method = "close",
    args = {}
)
public void test_close() {
    cr = new CharArrayReader(hw);
    cr.close();
    try {
        cr.read();
        fail("Failed to throw exception on read from closed stream");
    } catch (IOException e) {
        // Expected.
    }

}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * @tests java.io.CharArrayReader#mark(int)
 */
@TestTargetNew(
    level = TestLevel.COMPLETE,
    method = "mark",
    args = {int.class}
)
public void test_markI() throws IOException {
    // Test for method void java.io.CharArrayReader.mark(int)
    cr = new CharArrayReader(hw);
    cr.skip(5L);
    cr.mark(100);
    cr.read();
    cr.reset();
    assertEquals("Test 1: Failed to mark correct position;",
            'W', cr.read());

    cr.close();
    try {
        cr.mark(100);
        fail("Test 2: IOException expected.");
    } catch (IOException e) {
        // Expected.
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * @tests java.io.CharArrayReader#reset()
 */
@TestTargetNew(
    level = TestLevel.COMPLETE,
    method = "reset",
    args = {}
)
public void test_reset() throws IOException {
    cr = new CharArrayReader(hw);
    cr.skip(5L);
    cr.mark(100);
    cr.read();
    cr.reset();
    assertEquals("Test 1: Reset failed to return to marker position.",
            'W', cr.read());

    cr.close();
    try {
        cr.reset();
        fail("Test 2: IOException expected.");
    } catch (IOException e) {
        // Expected.
    }
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
	 * A memory efficient way to write a StringBuffer to an OutputStream
	 * without creating Strings and other Objects.
	 * <p/>
	 * Mar 9, 2012
	 *
	 * @param aSB
	 * @param ous
	 * @throws IOException
	 */
//    public static void writeSBToStreamEfficiently(StringBuffer aSB, OutputStream ous) throws IOException{
	public static void writeSBToStreamEfficiently( StringBuffer aSB, Writer ous ) throws IOException
	{

		final int aLength = aSB.length();
		final int aChunk = 1024;
		final char[] aChars = new char[aChunk];    //aPosEnd-aPosStart];	//aChunk];

		for( int aPosStart = 0; aPosStart < aLength; aPosStart += aChunk )
		{
			final int aPosEnd = Math.min( aPosStart + aChunk, aLength );
			aSB.getChars( aPosStart, aPosEnd, aChars, 0 );                 // Create no new buffer
			final CharArrayReader aCARead = new CharArrayReader( aChars ); // Create no new buffer

			// This may be slow but it will not create any more buffer (for bytes)
			int aByte;
			int i = 0;
			while( ((aByte = aCARead.read()) != -1) && (i++ < (aPosEnd - aPosStart)) )
			{
				ous.write( aByte );
			}
		}
	}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
/**
 * java.io.CharArrayReader#close()
 */
public void test_close() {
    cr = new CharArrayReader(hw);
    cr.close();
    try {
        cr.read();
        fail("Failed to throw exception on read from closed stream");
    } catch (IOException e) {
        // Expected.
    }

}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
@Test
public void testDefault() throws IOException {
    char[] chars = "The CharArrayReader class enables you to read the contents of a char array as a character stream".toCharArray();
    CharArrayReader reader = new CharArrayReader(chars);
    int data = reader.read();
    while (data != -1) {
        System.out.print((char) data);
        data = reader.read();
    }
    System.out.println();
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
@Test
public void testReadChars() throws IOException {
    char[] chars = "The CharArrayReader class enables you to read the contents of a char array as a character stream".toCharArray();
    CharArrayReader reader = new CharArrayReader(chars);
    int length = 5;
    char[] b = new char[length];
    int readLength = reader.read(b);
    while (readLength != -1) {
        System.out.print(new String(b, 0, readLength));
        readLength = reader.read(b);
    }
    System.out.println();
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
@Test
public void testReadCharsOffLen() throws IOException {
    char[] chars = "The CharArrayReader class enables you to read the contents of a char array as a character stream".toCharArray();
    CharArrayReader reader = new CharArrayReader(chars);
    int length = 5;
    char[] b = new char[length];
    int readLength = reader.read(b, 0, length);
    while (readLength != -1) {
        System.out.print(new String(b, 0, readLength));
        readLength = reader.read(b, 0, length);
    }
    System.out.println();
}
 

import java.io.CharArrayReader; //导入方法依赖的package包/类
@Test
public void testReadCharsOffLen2() throws IOException {
    char[] chars = "The CharArrayReader class enables you to read the contents of a char array as a character stream".toCharArray();
    CharArrayReader reader = new CharArrayReader(chars, 0, 5);
    int data = reader.read();
    while (data != -1) {
        System.out.print((char) data);
        data = reader.read();
    }
    System.out.println();
}