datatypetest.java

递归子程序法：对应每个非终结符语法单元编一个独立的处理过程（或子程序）。语法分析从读入第一个单词开始

	/** 
	 * Java语言实验参考程序
	 * Company 北京师范大学计算机系
 
	 * @author 孙一林
	 * @version 1.0
	 */

import java.io.*;

public class DataTypeTest {
  static int ARRAY_MAX_VALUE = 128;
  public static void main(String[] args) throws IOException {
    byte b_Byte;
    short s_Short;
    int i_Int;
    long l_Long;
    char c_Char;
    float f_Float;
    double d_Double;
    boolean bool_Boolean = true;
    b_Byte = ARRAY_MAX_VALUE;         // b_Byte = (byte)ARRAY_MAX_VALUE;
    byte[] b_Array = new byte[b_Byte];
    char[] c_Array = new char[b_Byte];
    s_Short = b_Byte;
    c_Char = b_Byte;                  // c_Char = (char)b_Byte;
    b_Byte = 0x1234;
    i_Int = s_Short;
    s_Short = 1.25F;
    l_Long = i_Int;
    i_Int = 12345L;
    f_Float = (float)l_Long;
    d_Double = 0.5E-4;
    i_Int = (int)d_Double;
    s_Short = (short)i_Int;
    i_Int = l_Long;
    i_Int = (int)bool_Boolean;
    System.out.println("b_Byte = "+ b_Byte);
    System.out.println("s_Short = " + s_Short);
    System.out.println("i_Int = " + i_Int);
    System.out.println("l_Long = " + l_Long);
    System.out.println("c_Char = " + c_Char);
    System.out.println("f_Float = " + f_Float);
    System.out.println("d_Double = " + d_Double);
    System.out.println("bool_Boolean = " + bool_Boolean);
    System.out.print("Input characters please:");
    System.in.read(b_Array);
    b_Array = (byte)c_Array;
    System.out.print("Input characters are(c_Array):");
    System.out.println("c_Array = " + c_Array);
    System.out.print("Input characters are(b_Array):");
    System.out.println("b_Array = " + b_Array);
  }
}