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copied!<p>Create <strong>fields</strong> for <code>a</code> and <code>b</code>, and initialize them in <code>f()</code> with the parameters.</p> <p>E.g., like this:</p> <pre><code>public class CC{ private int a; private int b; private int d; private int c; public int f(int a,int b) { d=a; c=b; this.a = a; this.b = b; return a+b; } //want to use a & b outside public int q(int a, int b) { return a+b; //re-initial-is- will delete the previous parameter value; } public int w(){ int p=a+b; //error:cannot access or resolve a & b into variables return p; } public int e(){ int u=d+c; //works but this is not the solution return u; } public static void main(String args[]){ CC obj=new CC(); System.out.println(obj.f(3,4)); System.out.println(obj.q(8,9)); System.out.println(obj.w()); System.out.println(obj.e()); } } </code></pre> <p>This will print the following to the console:</p> <pre><code>7 17 7 7 </code></pre> <p>However, usage of the fields should depend on what you are trying to do.</p> <p>E.g., if you would want to use <em>a</em> and <em>b</em> once (for calculating <em>a</em> + <em>b</em>), then reset them with new values, and be able to use both the old and the new values, you would need to do something like this:</p> <pre><code>package test; public class CC { private int a; private int b; private int d; private int c; public int f(int initialA, int initialB) { this.a = initialA; this.b = initialB; return a+b; } //want to use a & b outside public int q(int resetA, int resetB) { // Move values for a + b to other variables for re-use this.c = a; this.d = b; this.a = resetA; this.b = resetB; return a+b; //re-initial-is- will delete the previous parameter value; } public int w() { // Use the initial values int p = c + d; return p; } public int e() { // Use the reset values int u = a + b; //works but this is not the solution return u; } public static void main(String args[]){ CC obj = new CC(); System.out.println(obj.f(3,4)); System.out.println(obj.q(8,9)); System.out.println(obj.w()); System.out.println(obj.e()); } } </code></pre> <p>This will print the following to the console:</p> <pre><code>7 17 7 17 </code></pre>

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