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"abcd".startsWith("ab") //returns true
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"abcd".endsWith("zn") //returns false
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"abab".contains("bb") //returns false
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"abab".contains("ab") //returns true
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int loc = "abab".indexOf("bb") //returns -1
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loc = "abab".indexOf("ab") //returns 0
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loc = "abab".indexOf("ab",loc+1) //returns 2
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