變數mynation從列表{"china","US","UK"}中隨機取值

String[] nation = new String[]{"china","US","UK"};
Random random =  new Random();
int i = random.nexInt(nation.length);
vars.put("mynation",nation[i]);

在需要使用的地方直接${mynation}引用即可

如果要設定兩個變數且變數值隨機但不重複，可以通過兩個列表放置不同值實現

String[] nation = new String[]{"china","US","UK"};
Random random 
 
= new Random();
int i = random.nextInt(nation.length);
vars.put("mynation",nation[i]);

String[] num = new String[]{"8","2","1","7"};
Random r = new Random();
int j = r.nextInt(num.length);
vars.put("anum",num[j]);