注：这篇博文当时有点问题，今天(2020-02-13 )被修改了。 但是，文章的摘要还是修改前的内容，我来说明。
代码如下：
import java.util.Scanner； /**Java how to program， 10 thedition * 14.3 (comparing strings ) writeanapplicationthatusesstringmethodcompareto * tocomparetwostringsinputbytheuser . lessthan，equaltoorgreaterthanthesecond.* @ authorpandenghuang @ 163.com */public class compare to { publicstaticvoicvoidmain String s1=input.nextLine (； 请输入System.out.print ('字符串2:' )； String s2=input.nextLine (； intresult=S1.comPareto(S2； if(result0) System.out.printf (字符串1-%s为字符串2-%s%n )，s1，s2 )； elseif(result0) System.out.printf (字符串1-%s为字符串2-%s%n )，s1，s2 )； else System.out.printf (比较结果：字符串1-%s为字符串2-%s%n )，s1，s2 )； }
运行结果：
字符串1 :请输入海
字符串2 :请输入斌
字符串1-海大于字符串2-斌
附件：
JavaDoc中的compareTo方法的说明如下。
int Java.lang.string.com Pareto (stringanotherstring ) )。
comparestwostringslexicographically.thecomparisonisbasedontheunicodevalueofeachcharacterinthestrings.thecharactersersequencer scomparedlexicographicallytothecharactersequencerepresentedbytheargumentstring.theresultisanegativeintegative thistringongobjective theargumentstring.theresultisapositiveintegerifthisstringobjectlexicographicallyfolliy argumentstring.theresultiszeroifthesthestring compare to returns0exactlywhentheequals (对象) method would returntrue。
thisisthedefinitionoflexicographicordering.iftwostringsaredifferent，theneitheyhavedifferentcharactersatsomeindexthatisisting or their lengths are different，orboth.iftheyhavedifferentcharactersatoneormoreindexpositions，let k be the smallest such index； thenthestringwhosecharacteratpositionkhasthesmallervalue，as determined by using the operator，lexicographicallyprecedestheotherstherstheratother comparetoreturnsthedifferenceofthetwocharactervaluesatpositionkinthetwo
this.Charat(k )-anotherString.charAt(k ) k ) )。
ifthereisnoindexpositionatwhichtheydiffer，thentheshorterstringlexicographicallyprecedesthelongerstring.in this case，compart
this.length (-anotherstring.length ) (Specified by:compareTo )…) in Comparable Parameters:
33558 www.Sina.com/thestringtobecompared。
Returns:
the value0iftheargumentstringisequaltothisstring； A valueless than0ifthisstringislexicographicallylessthanthestringargument； andavaluegreaterthan0ifthisstringislexicographicallygreaterthanthestringargument。