字符串操作的几个简单示例

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public class StringExample
{       public static void main(String[] args)
        {       String s1 = "Computer Science";
                int x = 307;
                String s2 = s1 + " " + x;
                String s3 = s2.substring(10,17);
                String s4 = "is fun";
                String s5 = s2 + s4;
                
                System.out.println("s1: " + s1);
                System.out.println("s2: " + s2);
                System.out.println("s3: " + s3);
                System.out.println("s4: " + s4);
                System.out.println("s5: " + s5);
                
                //showing effect of precedence
                
                x = 3;
                int y = 5;
                String s6 = x + y + "total";
                String s7 = "total " + x + y;
                String s8 = " " + x + y + "total";
                System.out.println("s6: " + s6);
                System.out.println("s7: " + s7);
                System.out.println("s8: " + s8);
        }
}

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