string important concepts in java code example

Example 1: string method example in java

public String substring(int begin)/ public String substring(int begin, int end)
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String x = "0123456789"; // the value of each char is the same as its index!
System.out.println( x.substring(5) ); // output is "56789"
System.out.println( x.substring(5, 8)); // output is "567"

Example 2: string method example in java

public String concat(String s)

String x = "book";
System.out.println( x.concat(" author") ); // output is "book author"