### Question:
ISOField extends ISOComponent implements Cloneable, Externalizable { @Override public void setFieldNumber (int fieldNumber) { this.fieldNumber = fieldNumber; } ISOField();  ISOField(int n);  ISOField(int n, String v); @Override byte[] pack(); @Override int unpack(byte[] b); @Override void unpack(InputStream in); @Override Object getKey(); @Override Object getValue(); @Override void setValue(Object obj); @Override byte[] getBytes(); @Override void dump(PrintStream p, String indent); @Override void setFieldNumber(int fieldNumber); @Override int getFieldNumber(); @Override void writeExternal(ObjectOutput out); @Override void readExternal(ObjectInput in);  }### Answer:
@Test public void testSetFieldNumber() throws Throwable { ISOField iSOField = new ISOField(100); iSOField.setFieldNumber(1000); assertEquals(1000, iSOField.fieldNumber, "iSOField.fieldNumber"); }