StringBuilder

title: StringBuilder in Java description: StringBuilder class — fast mutable String

StringBuilder bhi mutable String hai lekin thread-safe nahi hai. Isliye single-threaded environment mein use karo — StringBuffer se fast hai.

Create karna

java exampleWoHoTech

StringBuilder sb = new StringBuilder();
StringBuilder sb2 = new StringBuilder("Hello");
StringBuilder sb3 = new StringBuilder(100); // initial capacity

Methods (StringBuffer jaisi hi)

java exampleWoHoTech

StringBuilder sb = new StringBuilder("Java");

sb.append(" Programming");       // "Java Programming"
sb.insert(4, " SE");             // "Java SE Programming"
sb.delete(4, 7);                 // "Java Programming"
sb.reverse();                    // Reverse
sb.replace(0, 4, "Python");      // Replace range
sb.length();                     // Length
sb.capacity();                   // Capacity
sb.toString();                   // String mein convert

String vs StringBuffer vs StringBuilder

Feature	String	StringBuffer	StringBuilder
Mutable	No	Yes	Yes
Thread Safe	Yes (immutable)	Yes	No
Performance	Slow (for concat)	Medium	Fast
Use Case	Read-only	Multi-thread	Single-thread

String Concatenation Performance

// Bad: Baar baar naya String object banta hai String result = ""; for (int i = 0; i < 1000; i++) result += i; // Good: Ek hi object modify hota hai StringBuilder sb = new StringBuilder(); for (int i = 0; i < 1000; i++) sb.append(i); String result = sb.toString();

title: StringBuilder in Java description: StringBuilder class — fast mutable String

StringBuilder bhi mutable String hai lekin thread-safe nahi hai. Isliye single-threaded environment mein use karo — StringBuffer se fast hai.

Create karna

java exampleWoHoTech

StringBuilder sb = new StringBuilder();
StringBuilder sb2 = new StringBuilder("Hello");
StringBuilder sb3 = new StringBuilder(100); // initial capacity

Methods (StringBuffer jaisi hi)

java exampleWoHoTech

StringBuilder sb = new StringBuilder("Java");

sb.append(" Programming");       // "Java Programming"
sb.insert(4, " SE");             // "Java SE Programming"
sb.delete(4, 7);                 // "Java Programming"
sb.reverse();                    // Reverse
sb.replace(0, 4, "Python");      // Replace range
sb.length();                     // Length
sb.capacity();                   // Capacity
sb.toString();                   // String mein convert

String vs StringBuffer vs StringBuilder

Feature	String	StringBuffer	StringBuilder
Mutable	No	Yes	Yes
Thread Safe	Yes (immutable)	Yes	No
Performance	Slow (for concat)	Medium	Fast
Use Case	Read-only	Multi-thread	Single-thread

StringBuilder

Create karna

Methods (StringBuffer jaisi hi)

String vs StringBuffer vs StringBuilder

String Concatenation Performance

Continue learning this concept

StringBuilder

Create karna

Methods (StringBuffer jaisi hi)

String vs StringBuffer vs StringBuilder

String Concatenation Performance

Continue learning this concept