I need help debugging this :  // This application displays some math facts public class DebugThree2 { publicstaticvoidmain(Stringargs[]) { int a =2, b =5, c =10; add(a, b); add(b, c); subtract(c, a); } publicstaticvoidadd(inta,b) { System.out.println("The sum of " + a + " and "+ a +" is "+ (a + b)); } publicstaticvoidsubtract(inta,b) { System.out.println("The difference between + a + " and " + b + " is " + (a * b)); } }

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Methods of StringBuilder class

The StringBuilder class can be used to create mutable strings. The methods defined in the StringBuilder class are widely used to manipulate and concatenate strings. It is a non-synchronized class which has public methods that can be accessed by multiple threads. It is not thread-safe.