String Handling

String Handling Supported by : java.lang.String java.lang.StringBuffer java.lang.StringBuilder

String ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],s2=s1.concat(s2); Java J2ee Heap s1 s2 Java J2ee Heap s1 s2 JavaJ2ee

[object Object],[object Object]

String Literal & String Constant Pool ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],s1 String Constant Pool microsoft IBM s2 s3 Heap s4 microsoft s5

String Literal & String Constant Pool ,[object Object]

Understanding the different ways to create String Objects ,[object Object],Noida s1 String Pool ,[object Object],[object Object],Heap Delhi s3 s2 Delhi Noida ,[object Object]

+ & += have been overloaded to work on Strings. ,[object Object],[object Object],[object Object],[object Object],6 a a c String Pool is whole no. Heap s1 s2 whole no. 6 is a whole no. System.out.println(a+s1+c+s2);

Working with Strings : Using public methods defined in the java.lang.String ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Shallow & Deep Comparison ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],java.lang.Object java.lang.String Output : true true false true public boolean equals(java.lang.Object); public boolean equals(java.lang.Object); equals (java.lang.Object) of java.lang.Object is overridden by equals(java.lang.Object) of java.lang.String

Shallow & Deep Comparison contd. ,[object Object],[object Object],String Pool Heap s1 s3 s2 star star

StringBuffer ,[object Object],[object Object],String s = “keyboard”; s.concat(“mouse”); System.out.println(s); // output ? String s = “Tom” s=s.concat(“cat”); System.out.println(s); // output ?

StringBuffer contd. ,[object Object],[object Object],[object Object],[object Object]

Important methods of StringBuffer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],StringBuffer sb = new StringBuffer(); sb.append(“5>6=“); sb.append(5>6);

Important methods of StringBuffer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

StringBuffer contd. ,[object Object],[object Object],[object Object],[object Object],Output : false false java.lang.Object java.lang.StringBuffer java.lang.AbstractStringBuilder public boolean equals(java.lang.Object);

String Handling

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String Handling