e074. searching a string for a character or a substring.txt

来自「这里面包含了一百多个JAVA源文件」· 文本 代码 · 共 26 行

See also e423 Quintessential Regular Expression Search Program. 
    String string = "madam, i am Adam";
    
    // Characters
    
        // First occurrence of a c
        int index = string.indexOf('a');    // 1
    
        // Last occurrence
        index = string.lastIndexOf('a');    // 14
    
        // Not found
        index = string.lastIndexOf('z');    // -1
    
    // Substrings
    
        // First occurrence
        index = string.indexOf("dam");      // 1
    
        // Last occurrence
        index = string.lastIndexOf("dam");  // 13
    
        // Not found
        index = string.lastIndexOf("z");    // -1