Compiling ok, run error classdef of main ?

Question

No error when compiling,
but when running I get: Exception in thread "main" java.lang.NoClassDefFoundError: test/java
everything worked yesterday. The only thing I added was:" " + (byte)(int)Math.pow(2,(int)87%8
here is test.java:
public class test
public static void main( String args[])
byte [] atest = {(byte)0x56,(byte)0x34,(byte)0x12,(byte)0x55};
System.out.println( intBcdBuffer2int(atest)+ " " + (byte)(int)Math.pow(2,(int)87%8));
static String oldasci(String strInput)
{ String back = "";
byte[] bBuffer = strInput.getBytes();
for(int i = 0; i < bBuffer.length; i++)
{bBuffer[i] = (byte)(bBuffer& 0x7F);}
for(int i = 0; i < bBuffer.length; i++)
{back = back + (bBuffer[i]& 0xFF);}
return back;
static byte bint2BcdByte(int int2Dig)
byte bToReturn = 0x00;
bToReturn = (byte)(int2Dig % 10);
bToReturn |= (byte)(((int2Dig-(int2Dig%10))/10)<<4);//tientallen
return bToReturn;
static int intBcdByte2Int( byte bBcd)
int intToReturn = 0;
intToReturn = (int)(bBcd & 0x0F); //eenheden
intToReturn = intToReturn + 10 *(int)(bBcd>>4); //tientallen
return intToReturn;
static byte[] bInt2BcdBuffer(int int16Dig)
{byte[] bBuffer = new byte[16];
for(int i = 0;( (((int16Dig/100) > 0) || ((int16Dig % 100) > 0))&&(i < bBuffer.length) ); i++)
{bBuffer[i] = bint2BcdByte((int16Dig % 100));
int16Dig = (int)(int16Dig - (int16Dig%100))/100;
return bBuffer;
static int intBcdBuffer2int(byte[] bBuffer)
{int intDig = 0;
    for(int i = 0; i < bBuffer.length; i++ )
      {intDig = intDig + (int)(intBcdByte2Int(bBuffer[i]) * Math.pow(10,(i*2)));}
return intDig;

Answer 1

you need to type "java Test" and not "java Test.java" (if your classpath settings are ok and you have compiled it it should run)