最病 A Java API Example package java. io public class File implements java. io Serializable private String path public boolean exists Security Manager security System getSecurity Manager( if(security !=null security checkRead(path) Same code repeated return exits 16 times in java. io. File public boolean canReado Security Manager security System getSecurity Manager(? if(security !=null) security. checkRead(path) return can Readoo Institute of Computer Software 2021/1/27 Nanjing UniversityJava API Example 2021/1/27 Institute of Computer Software Nanjing University 14 package java.io; public class File implements java.io.Serializable{ private String path; … public boolean exists(){ SecurityManager security = System.getSecurityManager(); if(security!=null){ security.checkRead(path); } return exits0(); } public boolean canRead(){ SecurityManager security = System.getSecurityManager(); if(security!=null){ security.checkRead(path); } return canRead0(); } Same code repeated 16 times in java.io.File