Java 拆分String String equals 方法的实现

　　　　

 

split

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package com.equal_;   import java.sql.SQLException;   public class Cast {   public static void main(String[] args) throws SQLException{     String s="ABCD";     String[] ss=s.split("");     for(String value:ss){       System.out.print(value+"\t");     }   } }

　　

iteration

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package com.equal_;   import java.sql.SQLException;   public class Cast {   public static void main(String[] args) throws SQLException{     String s="ABCD";     String[] ss=new String[s.length()];     for(int i=0;i<ss.length;++i){       ss[i]=s.charAt(i)+"";     }     for(String value:ss) System.out.print(value+"\t");       char[] c=new char[s.length()];     for(int i=0;i<c.length;++i){       c[i]=s.charAt(i);     }     for(char value:c) System.out.println(value);   } }

　　

 

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@Override public boolean equals(Object obj) {   if (this == obj) return true;   if (obj instanceof String) {     String str = (String) obj;     if (str.length() == this.length()) {       int i = 0;       int n = this.length();       while (n-- != 0) {         if (str.charAt(i) != this.charAt(i)) return false;       }     }   }   return false; // obj is not String }