Java tutorial
/* * ======================================================================== * * Copyright 2005 Tim O'Brien. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * ======================================================================== */ import java.math.BigDecimal; import java.util.HashSet; import java.util.Set; import java.math.BigDecimal; import org.apache.commons.lang.builder.CompareToBuilder; import org.apache.commons.lang.builder.EqualsBuilder; import org.apache.commons.lang.builder.HashCodeBuilder; import org.apache.commons.lang.builder.ToStringBuilder; class TaxReturn { private String ssn; private int year; private String lastName; private BigDecimal taxableIncome; public TaxReturn() { } public TaxReturn(String pSsn, int pYear, String pLastName, BigDecimal pTaxableIncome) { setSsn(pSsn); setYear(pYear); setLastName(pLastName); setTaxableIncome(pTaxableIncome); } public String getSsn() { return ssn; } public void setSsn(String pSsn) { ssn = pSsn; } public int getYear() { return year; } public void setYear(int pYear) { year = pYear; } public String getLastName() { return lastName; } public void setLastName(String pLastName) { lastName = pLastName; } public BigDecimal getTaxableIncome() { return taxableIncome; } public void setTaxableIncome(BigDecimal pTaxableIncome) { taxableIncome = pTaxableIncome; } public String toString() { return new ToStringBuilder(this).append("ssn", ssn).append("year", year).append("lastName", lastName) .toString(); } public int hashCode() { return new HashCodeBuilder(3, 7).append(ssn).append(year).toHashCode(); } public boolean equals(Object pObject) { boolean equals = false; if (pObject instanceof TaxReturn) { TaxReturn bean = (TaxReturn) pObject; equals = (new EqualsBuilder().append(ssn, bean.ssn).append(year, bean.year)).isEquals(); } return equals; } public int compareTo(Object pObject) { return CompareToBuilder.reflectionCompare(this, pObject); } } public class MainClass { public static void main(String[] pArgs) throws Exception { TaxReturn return1 = new TaxReturn("012-68-3242", 1998, "O'Brien", new BigDecimal(43000.00)); TaxReturn return2 = new TaxReturn("012-68-3242", 1999, "O'Brien", new BigDecimal(45000.00)); TaxReturn return3 = new TaxReturn("012-68-3242", 1999, "O'Brien", new BigDecimal(53222.00)); System.out.println("ToStringBuilder: " + return1.toString()); } }