Java 正则表达式 zz

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确定一个串是否包含另一个串下文摘自（http://www.javaref.cn/egs/java.lang/HasSubstr.html）

    String string = "Madam, I am Adam";
   
    // Starts with
    boolean  b = string.startsWith("Mad");  // true
   
    // Ends with
    b = string.endsWith("dam");             // true
   
    // Anywhere
    b = string.indexOf("I am") > 0;         // true
   
    // To ignore case, regular expressions must be used
   
    // Starts with
    b = string.matches("(?i)mad.*");
   
    // Ends with
    b = string.matches("(?i).*adam");
   
    // Anywhere
    b = string.matches("(?i).*i am.*");